./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2128999246 <...> Warning: Permanently added '10.128.1.131' (ED25519) to the list of known hosts. execve("./syz-executor2128999246", ["./syz-executor2128999246"], 0x7ffe76fd57c0 /* 10 vars */) = 0 brk(NULL) = 0x555556eda000 brk(0x555556edad40) = 0x555556edad40 arch_prctl(ARCH_SET_FS, 0x555556eda3c0) = 0 set_tid_address(0x555556eda690) = 5024 set_robust_list(0x555556eda6a0, 24) = 0 rseq(0x555556edace0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2128999246", 4096) = 28 getrandom("\x9b\x59\xfd\xfe\x23\xc8\xc4\x23", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556edad40 brk(0x555556efbd40) = 0x555556efbd40 brk(0x555556efc000) = 0x555556efc000 mprotect(0x7f81bb283000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 mkdir("./syzkaller.p0uXmg", 0700) = 0 chmod("./syzkaller.p0uXmg", 0777) = 0 chdir("./syzkaller.p0uXmg") = 0 mkdir("./0", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5025 ./strace-static-x86_64: Process 5025 attached [pid 5025] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5025] chdir("./0") = 0 [pid 5025] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5025] setpgid(0, 0) = 0 [pid 5025] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5025] write(3, "1000", 4) = 4 [pid 5025] close(3) = 0 [pid 5025] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5025] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5025] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5025] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5025] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5025] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5025] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5026 attached => {parent_tid=[5026]}, 88) = 5026 [pid 5025] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5025] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5025] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5025] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5026] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5026] set_robust_list(0x7f81bb1be9a0, 24 [pid 5025] <... mprotect resumed>) = 0 [pid 5026] <... set_robust_list resumed>) = 0 [pid 5026] rt_sigprocmask(SIG_SETMASK, [], [pid 5025] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5026] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5026] memfd_create("syzkaller", 0 [pid 5025] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5025] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5028]}, 88) = 5028 [pid 5025] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5025] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5025] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5028 attached [pid 5028] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5026] <... memfd_create resumed>) = 3 [pid 5028] set_robust_list(0x7f81bb19d9a0, 24 [pid 5026] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5028] <... set_robust_list resumed>) = 0 [pid 5026] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5028] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5028] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5028] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5025] <... futex resumed>) = 0 [pid 5028] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5025] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5028] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5025] <... futex resumed>) = 0 [pid 5028] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5025] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5028] <... mount resumed>) = 0 [pid 5028] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5025] <... futex resumed>) = 0 [pid 5025] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5025] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5028] <... futex resumed>) = 1 [pid 5028] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5028] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5025] <... futex resumed>) = 0 [pid 5025] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5025] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5028] <... futex resumed>) = 1 [pid 5028] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5028] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5025] <... futex resumed>) = 0 [pid 5028] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5026] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5026] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5026] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5026] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5026] close(3) = 0 [pid 5026] mkdir("./file1", 0777) = 0 [ 51.696396][ T5026] syz-executor212[5026]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 51.709687][ T28] audit: type=1800 audit(1693866682.451:2): pid=5028 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 51.716301][ T5026] loop0: detected capacity change from 0 to 512 [pid 5026] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5026] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5026] chdir("./file1") = 0 [pid 5026] ioctl(6, LOOP_CLR_FD) = 0 [pid 5026] close(6) = 0 [pid 5026] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5026] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5025] exit_group(0 [pid 5028] <... futex resumed>) = ? [pid 5026] <... futex resumed>) = ? [pid 5025] <... exit_group resumed>) = ? [pid 5028] +++ exited with 0 +++ [pid 5026] +++ exited with 0 +++ [pid 5025] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5025, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./0/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./0/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/bus") = 0 umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/binderfs") = 0 [ 51.748609][ T5026] EXT4-fs (loop0): 1 orphan inode deleted [ 51.754517][ T5026] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 51.767470][ T5026] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/0/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./0/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./0") = 0 mkdir("./1", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5032 ./strace-static-x86_64: Process 5032 attached [pid 5032] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5032] chdir("./1") = 0 [pid 5032] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5032] setpgid(0, 0) = 0 [pid 5032] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5032] write(3, "1000", 4) = 4 [pid 5032] close(3) = 0 [pid 5032] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5032] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5032] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5032] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5032] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5032] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5032] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5032] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5033 attached [pid 5033] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5032] <... clone3 resumed> => {parent_tid=[5033]}, 88) = 5033 [pid 5033] <... rseq resumed>) = 0 [pid 5033] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5033] rt_sigprocmask(SIG_SETMASK, [], [pid 5032] rt_sigprocmask(SIG_SETMASK, [], [pid 5033] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5033] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5032] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5032] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5033] <... futex resumed>) = 0 [pid 5032] <... futex resumed>) = 1 [pid 5032] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5032] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5033] memfd_create("syzkaller", 0 [pid 5032] <... mmap resumed>) = 0x7f81bb17d000 [pid 5032] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5032] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5032] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5034 attached [pid 5034] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5032] <... clone3 resumed> => {parent_tid=[5034]}, 88) = 5034 [pid 5034] <... rseq resumed>) = 0 [pid 5032] rt_sigprocmask(SIG_SETMASK, [], [pid 5034] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5032] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5034] rt_sigprocmask(SIG_SETMASK, [], [pid 5032] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5034] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5032] <... futex resumed>) = 0 [pid 5034] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5032] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5034] <... open resumed>) = 3 [pid 5034] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5032] <... futex resumed>) = 0 [pid 5032] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5032] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5034] <... futex resumed>) = 1 [pid 5034] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5034] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5032] <... futex resumed>) = 0 [pid 5032] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5032] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5034] <... futex resumed>) = 1 [pid 5034] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 4 [pid 5034] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5032] <... futex resumed>) = 0 [pid 5032] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 51.798163][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 51.838079][ T5033] syz-executor212[5033]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [pid 5034] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5032] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5034] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5034] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5032] <... futex resumed>) = 0 [pid 5034] <... futex resumed>) = 1 [pid 5034] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5033] <... memfd_create resumed>) = 5 [pid 5033] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5033] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5033] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5033] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5033] ioctl(6, LOOP_SET_FD, 5) = 0 [pid 5033] close(5) = 0 [pid 5033] mkdir("./file1", 0777) = 0 [ 51.848072][ T28] audit: type=1800 audit(1693866682.581:3): pid=5034 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 51.859091][ T5033] loop0: detected capacity change from 0 to 512 [ 51.888107][ T5033] EXT4-fs (loop0): 1 orphan inode deleted [pid 5033] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5033] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 5 [pid 5033] chdir("./file1") = 0 [pid 5033] ioctl(6, LOOP_CLR_FD) = 0 [pid 5033] close(6) = 0 [pid 5033] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5033] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5032] exit_group(0 [pid 5033] <... futex resumed>) = ? [pid 5032] <... exit_group resumed>) = ? [pid 5033] +++ exited with 0 +++ [pid 5034] <... futex resumed>) = ? [pid 5034] +++ exited with 0 +++ [pid 5032] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5032, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./1/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./1/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/bus") = 0 umount2("./1/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/binderfs") = 0 [ 51.894023][ T5033] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 51.907005][ T5033] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/1/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./1/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./1") = 0 mkdir("./2", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5037 attached , child_tidptr=0x555556eda690) = 5037 [pid 5037] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5037] chdir("./2") = 0 [pid 5037] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5037] setpgid(0, 0) = 0 [pid 5037] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5037] write(3, "1000", 4) = 4 [pid 5037] close(3) = 0 [pid 5037] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5037] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 51.953384][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5037] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5037] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5037] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5037] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5037] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5037] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5038]}, 88) = 5038 ./strace-static-x86_64: Process 5038 attached [pid 5038] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5037] rt_sigprocmask(SIG_SETMASK, [], [pid 5038] <... rseq resumed>) = 0 [pid 5038] set_robust_list(0x7f81bb1be9a0, 24 [pid 5037] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5038] <... set_robust_list resumed>) = 0 [pid 5037] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5038] rt_sigprocmask(SIG_SETMASK, [], [pid 5037] <... futex resumed>) = 0 [pid 5038] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5037] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5037] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5037] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5038] memfd_create("syzkaller", 0 [pid 5037] <... mprotect resumed>) = 0 [pid 5037] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5037] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5039]}, 88) = 5039 [pid 5037] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5037] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5037] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5039 attached [pid 5039] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5039] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5039] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5039] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5039] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5037] <... futex resumed>) = 0 [pid 5037] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5039] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5037] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5039] <... mount resumed>) = 0 [pid 5039] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5037] <... futex resumed>) = 0 [pid 5039] <... futex resumed>) = 1 [pid 5037] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5039] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5038] <... memfd_create resumed>) = 4 [pid 5037] <... futex resumed>) = 0 [pid 5038] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5037] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5038] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5039] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5037] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5039] <... futex resumed>) = 0 [pid 5039] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5037] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5039] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5037] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5039] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5038] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5039] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5039] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5037] <... futex resumed>) = 0 [pid 5039] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5038] <... write resumed>) = 262144 [pid 5038] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5038] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5038] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5038] close(4) = 0 [pid 5038] mkdir("./file1", 0777) = 0 [ 52.030414][ T5038] syz-executor212[5038]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 52.037212][ T28] audit: type=1800 audit(1693866682.771:4): pid=5039 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.065752][ T5038] loop0: detected capacity change from 0 to 512 [pid 5038] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5038] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5038] chdir("./file1") = 0 [pid 5038] ioctl(6, LOOP_CLR_FD) = 0 [pid 5038] close(6) = 0 [pid 5038] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5038] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5037] exit_group(0 [pid 5038] <... futex resumed>) = ? [pid 5039] <... futex resumed>) = ? [pid 5038] +++ exited with 0 +++ [pid 5039] +++ exited with 0 +++ [pid 5037] <... exit_group resumed>) = ? [pid 5037] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5037, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./2", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./2/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./2/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/bus") = 0 umount2("./2/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/binderfs") = 0 [ 52.087832][ T5038] EXT4-fs (loop0): 1 orphan inode deleted [ 52.093725][ T5038] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 52.106860][ T5038] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/2/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./2/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./2") = 0 mkdir("./3", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5042 attached , child_tidptr=0x555556eda690) = 5042 [pid 5042] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5042] chdir("./3") = 0 [pid 5042] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5042] setpgid(0, 0) = 0 [pid 5042] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5042] write(3, "1000", 4) = 4 [pid 5042] close(3) = 0 [pid 5042] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5042] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5042] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5042] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5042] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5042] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5042] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5043 attached [pid 5043] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5042] <... clone3 resumed> => {parent_tid=[5043]}, 88) = 5043 [pid 5043] <... rseq resumed>) = 0 [pid 5042] rt_sigprocmask(SIG_SETMASK, [], [pid 5043] set_robust_list(0x7f81bb1be9a0, 24 [pid 5042] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5043] <... set_robust_list resumed>) = 0 [pid 5042] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5043] rt_sigprocmask(SIG_SETMASK, [], [pid 5042] <... futex resumed>) = 0 [pid 5043] <... rt_sigprocmask resumed>NULL, 8) = 0 [ 52.141259][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5042] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5043] memfd_create("syzkaller", 0 [pid 5042] <... futex resumed>) = 0 [pid 5042] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5042] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5042] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5042] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5043] <... memfd_create resumed>) = 3 ./strace-static-x86_64: Process 5044 attached [pid 5043] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5044] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5043] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5042] <... clone3 resumed> => {parent_tid=[5044]}, 88) = 5044 [pid 5044] <... rseq resumed>) = 0 [pid 5042] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5042] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5044] set_robust_list(0x7f81bb19d9a0, 24 [pid 5043] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5044] <... set_robust_list resumed>) = 0 [pid 5044] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5044] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5044] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5043] <... write resumed>) = 262144 [pid 5044] <... futex resumed>) = 1 [pid 5043] munmap(0x7f81b2d7d000, 262144 [pid 5044] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5042] <... futex resumed>) = 0 [pid 5042] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5043] <... munmap resumed>) = 0 [pid 5042] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5044] <... futex resumed>) = 0 [pid 5044] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5043] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5043] ioctl(5, LOOP_SET_FD, 3 [pid 5044] <... mount resumed>) = 0 [pid 5044] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5042] <... futex resumed>) = 0 [pid 5042] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5044] <... futex resumed>) = 1 [pid 5044] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5044] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5042] <... futex resumed>) = 0 [pid 5042] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5044] <... futex resumed>) = 1 [ 52.187736][ T5043] syz-executor212[5043]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 52.205199][ T28] audit: type=1800 audit(1693866682.951:5): pid=5044 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.227456][ T5043] loop0: detected capacity change from 0 to 512 [pid 5044] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5043] <... ioctl resumed>) = 0 [pid 5043] close(3) = 0 [pid 5043] mkdir("./file1", 0777) = 0 [pid 5043] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5044] <... write resumed>) = -1 EIO (Input/output error) [pid 5044] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5042] <... futex resumed>) = 0 [pid 5044] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5043] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5043] ioctl(5, LOOP_CLR_FD) = 0 [pid 5043] close(5) = 0 [pid 5043] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5043] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5042] exit_group(0 [pid 5043] <... futex resumed>) = ? [pid 5043] +++ exited with 0 +++ [pid 5042] <... exit_group resumed>) = ? [pid 5044] <... futex resumed>) = ? [pid 5044] +++ exited with 0 +++ [pid 5042] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5042, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./3", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./3/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./3/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/bus") = 0 umount2("./3/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/binderfs") = 0 umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./3/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./3") = 0 mkdir("./4", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5045 attached , child_tidptr=0x555556eda690) = 5045 [pid 5045] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5045] chdir("./4") = 0 [pid 5045] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5045] setpgid(0, 0) = 0 [ 52.232760][ T5044] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 52.243585][ T5044] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 52.256682][ T5043] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5045] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5045] write(3, "1000", 4) = 4 [pid 5045] close(3) = 0 [pid 5045] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5045] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5045] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5045] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5045] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5045] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5045] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5045] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5046]}, 88) = 5046 [pid 5045] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5045] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5045] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5045] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5045] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 ./strace-static-x86_64: Process 5046 attached [pid 5046] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5045] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5046] <... rseq resumed>) = 0 [pid 5045] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5046] set_robust_list(0x7f81bb1be9a0, 24 [pid 5045] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5046] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 5047 attached [pid 5046] rt_sigprocmask(SIG_SETMASK, [], [pid 5047] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5046] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5045] <... clone3 resumed> => {parent_tid=[5047]}, 88) = 5047 [pid 5047] set_robust_list(0x7f81bb19d9a0, 24 [pid 5046] memfd_create("syzkaller", 0 [pid 5045] rt_sigprocmask(SIG_SETMASK, [], [pid 5047] <... set_robust_list resumed>) = 0 [pid 5045] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5045] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5045] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5047] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5047] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5047] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5046] <... memfd_create resumed>) = 4 [pid 5047] <... futex resumed>) = 1 [pid 5046] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5047] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5045] <... futex resumed>) = 0 [pid 5045] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5047] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5046] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5047] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5045] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5047] <... mount resumed>) = 0 [pid 5047] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5045] <... futex resumed>) = 0 [pid 5047] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5045] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5047] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5045] <... futex resumed>) = 0 [pid 5047] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5045] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5047] <... open resumed>) = 5 [pid 5047] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5045] <... futex resumed>) = 0 [pid 5045] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5047] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5045] <... futex resumed>) = 0 [pid 5047] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5045] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5047] <... futex resumed>) = 0 [pid 5045] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5047] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5046] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5046] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5046] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5046] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5046] close(4) = 0 [pid 5046] mkdir("./file1", 0777) = 0 [ 52.308644][ T5046] syz-executor212[5046]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 52.311134][ T28] audit: type=1800 audit(1693866683.051:6): pid=5047 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.346229][ T5046] loop0: detected capacity change from 0 to 512 [pid 5046] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5046] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5046] chdir("./file1") = 0 [pid 5046] ioctl(6, LOOP_CLR_FD) = 0 [pid 5046] close(6) = 0 [pid 5046] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5046] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5045] exit_group(0) = ? [pid 5047] <... futex resumed>) = ? [pid 5046] <... futex resumed>) = ? [pid 5047] +++ exited with 0 +++ [pid 5046] +++ exited with 0 +++ [pid 5045] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5045, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./4", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./4/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./4/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/bus") = 0 umount2("./4/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/binderfs") = 0 [ 52.367583][ T5046] EXT4-fs (loop0): 1 orphan inode deleted [ 52.373482][ T5046] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 52.386351][ T5046] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/4/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./4/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./4") = 0 mkdir("./5", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5050 ./strace-static-x86_64: Process 5050 attached [pid 5050] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5050] chdir("./5") = 0 [pid 5050] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5050] setpgid(0, 0) = 0 [pid 5050] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5050] write(3, "1000", 4) = 4 [pid 5050] close(3) = 0 [pid 5050] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5050] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5050] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5050] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5050] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5050] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5050] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5050] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5051]}, 88) = 5051 [pid 5050] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5050] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5051 attached [pid 5051] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5050] <... futex resumed>) = 0 [pid 5051] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5050] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5051] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5050] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5051] memfd_create("syzkaller", 0 [pid 5050] <... mmap resumed>) = 0x7f81bb17d000 [pid 5050] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5050] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5050] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5052]}, 88) = 5052 [pid 5050] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5050] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5050] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5052 attached [pid 5052] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5051] <... memfd_create resumed>) = 3 [pid 5052] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5051] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5052] rt_sigprocmask(SIG_SETMASK, [], [pid 5051] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5052] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5052] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5051] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5052] <... open resumed>) = 4 [pid 5051] <... write resumed>) = 262144 [ 52.416233][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 52.457194][ T5051] syz-executor212[5051]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [pid 5051] munmap(0x7f81b2d7d000, 262144 [pid 5052] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5051] <... munmap resumed>) = 0 [pid 5052] <... futex resumed>) = 1 [pid 5051] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5052] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5051] <... openat resumed>) = 5 [pid 5051] ioctl(5, LOOP_SET_FD, 3 [pid 5050] <... futex resumed>) = 0 [pid 5050] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5050] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5052] <... futex resumed>) = 0 [pid 5052] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5052] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5050] <... futex resumed>) = 0 [pid 5050] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5050] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5052] <... futex resumed>) = 1 [pid 5052] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5051] <... ioctl resumed>) = 0 [pid 5051] close(3) = 0 [pid 5051] mkdir("./file1", 0777 [pid 5052] <... open resumed>) = 6 [pid 5051] <... mkdir resumed>) = 0 [pid 5052] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5051] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5050] <... futex resumed>) = 0 [pid 5050] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5050] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5052] <... futex resumed>) = 1 [pid 5052] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 262144 [pid 5052] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5050] <... futex resumed>) = 0 [ 52.473096][ T28] audit: type=1800 audit(1693866683.211:7): pid=5052 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.493811][ T5051] loop0: detected capacity change from 0 to 512 [pid 5052] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5051] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5051] ioctl(5, LOOP_CLR_FD) = 0 [pid 5051] close(5) = 0 [pid 5051] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5050] exit_group(0 [pid 5052] <... futex resumed>) = ? [pid 5050] <... exit_group resumed>) = ? [pid 5052] +++ exited with 0 +++ [pid 5051] +++ exited with 0 +++ [pid 5050] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5050, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./5", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./5/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./5/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/bus") = 0 umount2("./5/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/binderfs") = 0 umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./5/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./5/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./5") = 0 mkdir("./6", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5053 attached , child_tidptr=0x555556eda690) = 5053 [pid 5053] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5053] chdir("./6") = 0 [pid 5053] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5053] setpgid(0, 0) = 0 [pid 5053] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5053] write(3, "1000", 4) = 4 [pid 5053] close(3) = 0 [ 52.515393][ T5051] EXT4-fs warning (device loop0): read_mmp_block:115: Error -117 while reading MMP block 8 [pid 5053] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5053] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5053] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5053] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5053] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5053] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5053] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5053] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5054 attached => {parent_tid=[5054]}, 88) = 5054 [pid 5054] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5053] rt_sigprocmask(SIG_SETMASK, [], [pid 5054] set_robust_list(0x7f81bb1be9a0, 24 [pid 5053] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5054] <... set_robust_list resumed>) = 0 [pid 5053] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5054] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5053] <... futex resumed>) = 0 [pid 5054] memfd_create("syzkaller", 0 [pid 5053] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5053] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5053] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5053] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5053] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5055]}, 88) = 5055 ./strace-static-x86_64: Process 5055 attached [pid 5053] rt_sigprocmask(SIG_SETMASK, [], [pid 5055] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5053] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5053] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5053] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5054] <... memfd_create resumed>) = 3 [pid 5054] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5055] <... rseq resumed>) = 0 [pid 5055] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5055] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5055] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5054] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5054] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5054] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5054] ioctl(5, LOOP_SET_FD, 3 [pid 5055] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5053] <... futex resumed>) = 0 [pid 5053] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5053] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5054] <... ioctl resumed>) = 0 [pid 5054] close(3) = 0 [pid 5054] mkdir("./file1", 0777 [pid 5055] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5054] <... mkdir resumed>) = 0 [pid 5054] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5055] <... mount resumed>) = 0 [pid 5055] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5053] <... futex resumed>) = 0 [pid 5055] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5053] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5055] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5053] <... futex resumed>) = 0 [pid 5053] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5055] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 3 [pid 5055] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5053] <... futex resumed>) = 0 [pid 5053] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5055] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5053] <... futex resumed>) = 0 [pid 5053] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5055] <... write resumed>) = 262144 [pid 5055] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5053] <... futex resumed>) = 0 [pid 5055] <... futex resumed>) = 1 [ 52.549105][ T5054] syz-executor212[5054]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 52.562995][ T28] audit: type=1800 audit(1693866683.301:8): pid=5055 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.567113][ T5054] loop0: detected capacity change from 0 to 512 [pid 5055] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5054] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5054] ioctl(5, LOOP_CLR_FD) = 0 [pid 5054] close(5) = 0 [pid 5054] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5054] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5053] exit_group(0 [pid 5055] <... futex resumed>) = ? [pid 5054] <... futex resumed>) = ? [pid 5055] +++ exited with 0 +++ [pid 5054] +++ exited with 0 +++ [pid 5053] <... exit_group resumed>) = ? [pid 5053] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5053, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} --- umount2("./6", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./6/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./6/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/bus") = 0 umount2("./6/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/binderfs") = 0 umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./6/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./6") = 0 mkdir("./7", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5056 attached , child_tidptr=0x555556eda690) = 5056 [pid 5056] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5056] chdir("./7") = 0 [pid 5056] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5056] setpgid(0, 0) = 0 [pid 5056] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5056] write(3, "1000", 4) = 4 [pid 5056] close(3) = 0 [ 52.613864][ T5054] EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock [ 52.623655][ T5054] EXT4-fs (loop0): group descriptors corrupted! [pid 5056] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5056] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5056] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5056] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5056] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5056] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5056] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5057 attached [pid 5057] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5056] <... clone3 resumed> => {parent_tid=[5057]}, 88) = 5057 [pid 5057] <... rseq resumed>) = 0 [pid 5056] rt_sigprocmask(SIG_SETMASK, [], [pid 5057] set_robust_list(0x7f81bb1be9a0, 24 [pid 5056] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5057] <... set_robust_list resumed>) = 0 [pid 5056] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5057] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5056] <... futex resumed>) = 0 [pid 5057] memfd_create("syzkaller", 0 [pid 5056] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5056] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5056] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5056] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5058]}, 88) = 5058 [pid 5056] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5056] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5056] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5058 attached [pid 5058] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5058] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5058] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5058] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5058] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5056] <... futex resumed>) = 0 [pid 5056] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5056] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5058] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5058] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] <... futex resumed>) = 0 [pid 5056] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5056] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5058] <... futex resumed>) = 1 [pid 5058] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 4 [pid 5058] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] <... futex resumed>) = 0 [pid 5056] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5056] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5058] <... futex resumed>) = 1 [pid 5058] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5058] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] <... futex resumed>) = 0 [pid 5058] <... futex resumed>) = 1 [pid 5058] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5057] <... memfd_create resumed>) = 5 [pid 5057] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5057] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5057] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5057] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5057] ioctl(6, LOOP_SET_FD, 5) = 0 [pid 5057] close(5) = 0 [pid 5057] mkdir("./file1", 0777) = 0 [ 52.654293][ T5057] syz-executor212[5057]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 52.670924][ T28] audit: type=1800 audit(1693866683.411:9): pid=5058 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.676328][ T5057] loop0: detected capacity change from 0 to 512 [pid 5057] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5057] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 5 [pid 5057] chdir("./file1") = 0 [pid 5057] ioctl(6, LOOP_CLR_FD) = 0 [pid 5057] close(6) = 0 [pid 5057] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] exit_group(0 [pid 5057] <... futex resumed>) = 0 [pid 5057] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5058] <... futex resumed>) = ? [pid 5056] <... exit_group resumed>) = ? [pid 5057] <... futex resumed>) = ? [pid 5058] +++ exited with 0 +++ [pid 5057] +++ exited with 0 +++ [pid 5056] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5056, si_uid=0, si_status=0, si_utime=0, si_stime=9 /* 0.09 s */} --- umount2("./7", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./7/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./7/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/bus") = 0 umount2("./7/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/binderfs") = 0 [ 52.728033][ T5057] EXT4-fs (loop0): 1 orphan inode deleted [ 52.733772][ T5057] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 52.746665][ T5057] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/7/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./7/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./7") = 0 mkdir("./8", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5061 attached , child_tidptr=0x555556eda690) = 5061 [pid 5061] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5061] chdir("./8") = 0 [pid 5061] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5061] setpgid(0, 0) = 0 [pid 5061] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "1000", 4) = 4 [pid 5061] close(3) = 0 [pid 5061] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5061] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5061] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5061] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5061] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5061] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5061] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5061] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5062 attached [pid 5062] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5062] set_robust_list(0x7f81bb1be9a0, 24 [pid 5061] <... clone3 resumed> => {parent_tid=[5062]}, 88) = 5062 [pid 5062] <... set_robust_list resumed>) = 0 [pid 5061] rt_sigprocmask(SIG_SETMASK, [], [pid 5062] rt_sigprocmask(SIG_SETMASK, [], [pid 5061] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5062] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5061] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5062] memfd_create("syzkaller", 0 [pid 5061] <... futex resumed>) = 0 [ 52.791258][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5061] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5061] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5061] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5061] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5061] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5063]}, 88) = 5063 [pid 5061] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5061] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5061] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5063 attached [pid 5063] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5063] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5063] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5063] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5062] <... memfd_create resumed>) = 4 [pid 5062] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5062] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5062] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5062] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5062] ioctl(5, LOOP_SET_FD, 4 [pid 5063] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5061] <... futex resumed>) = 0 [pid 5063] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5061] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5063] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5061] <... futex resumed>) = 0 [pid 5063] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5061] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5063] <... mount resumed>) = 0 [pid 5063] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5062] <... ioctl resumed>) = 0 [pid 5061] <... futex resumed>) = 0 [pid 5063] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5061] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5063] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5061] <... futex resumed>) = 0 [pid 5063] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5062] close(4 [pid 5061] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5063] <... open resumed>) = 6 [pid 5062] <... close resumed>) = 0 [pid 5063] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5061] <... futex resumed>) = 0 [pid 5063] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5061] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5063] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5062] mkdir("./file1", 0777 [pid 5061] <... futex resumed>) = 0 [pid 5063] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5062] <... mkdir resumed>) = 0 [pid 5061] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 52.832866][ T5062] syz-executor212[5062]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 52.842278][ T28] audit: type=1800 audit(1693866683.581:10): pid=5063 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.859411][ T5062] loop0: detected capacity change from 0 to 512 [pid 5062] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5063] <... write resumed>) = 262144 [pid 5063] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5063] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5061] <... futex resumed>) = 0 [pid 5062] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5062] ioctl(5, LOOP_CLR_FD) = 0 [pid 5062] close(5) = 0 [pid 5062] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5061] exit_group(0 [pid 5063] <... futex resumed>) = ? [pid 5061] <... exit_group resumed>) = ? [pid 5063] +++ exited with 0 +++ [pid 5062] +++ exited with 0 +++ [pid 5061] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5061, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./8", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./8/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./8/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/bus") = 0 umount2("./8/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/binderfs") = 0 umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./8/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./8") = 0 mkdir("./9", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 52.877114][ T5062] EXT4-fs (loop0): VFS: Can't find ext4 filesystem ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5064 ./strace-static-x86_64: Process 5064 attached [pid 5064] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5064] chdir("./9") = 0 [pid 5064] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5064] setpgid(0, 0) = 0 [pid 5064] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5064] write(3, "1000", 4) = 4 [pid 5064] close(3) = 0 [pid 5064] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5064] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5064] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5064] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5064] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5064] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5064] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5064] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5065 attached => {parent_tid=[5065]}, 88) = 5065 [pid 5065] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5064] rt_sigprocmask(SIG_SETMASK, [], [pid 5065] set_robust_list(0x7f81bb1be9a0, 24 [pid 5064] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5065] <... set_robust_list resumed>) = 0 [pid 5064] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5065] rt_sigprocmask(SIG_SETMASK, [], [pid 5064] <... futex resumed>) = 0 [pid 5065] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5064] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5065] memfd_create("syzkaller", 0 [pid 5064] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5064] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5064] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5064] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5066]}, 88) = 5066 [pid 5064] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5064] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5064] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5066 attached [pid 5066] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5066] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5066] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5066] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5066] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5065] <... memfd_create resumed>) = 4 [pid 5066] <... futex resumed>) = 1 [pid 5066] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5065] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5065] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5064] <... futex resumed>) = 0 [pid 5064] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5066] <... futex resumed>) = 0 [pid 5064] <... futex resumed>) = 1 [pid 5066] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5064] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5066] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5064] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5066] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5064] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5066] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5064] <... futex resumed>) = 0 [pid 5066] <... open resumed>) = 5 [pid 5066] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5064] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5066] <... futex resumed>) = 0 [pid 5066] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5064] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5064] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5066] <... futex resumed>) = 0 [pid 5064] <... futex resumed>) = 1 [pid 5066] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5064] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5066] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5066] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5064] <... futex resumed>) = 0 [pid 5066] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5065] <... write resumed>) = 262144 [pid 5065] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5065] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5065] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5065] close(4) = 0 [pid 5065] mkdir("./file1", 0777) = 0 [ 52.947827][ T5065] syz-executor212[5065]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 52.953098][ T28] audit: type=1800 audit(1693866683.691:11): pid=5066 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 52.984750][ T5065] loop0: detected capacity change from 0 to 512 [pid 5065] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5065] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5065] chdir("./file1") = 0 [pid 5065] ioctl(6, LOOP_CLR_FD) = 0 [pid 5065] close(6) = 0 [pid 5065] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5065] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5064] exit_group(0) = ? [pid 5066] <... futex resumed>) = ? [pid 5066] +++ exited with 0 +++ [pid 5065] <... futex resumed>) = ? [pid 5065] +++ exited with 0 +++ [pid 5064] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5064, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./9", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./9/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./9/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/bus") = 0 umount2("./9/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/binderfs") = 0 [ 52.998032][ T5065] EXT4-fs (loop0): 1 orphan inode deleted [ 53.003765][ T5065] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 53.016363][ T5065] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/9/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./9/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./9") = 0 mkdir("./10", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5069 ./strace-static-x86_64: Process 5069 attached [pid 5069] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5069] chdir("./10") = 0 [pid 5069] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5069] setpgid(0, 0) = 0 [pid 5069] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1000", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5069] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5069] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5069] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5069] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5069] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5069] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5069] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5070 attached => {parent_tid=[5070]}, 88) = 5070 [pid 5069] rt_sigprocmask(SIG_SETMASK, [], [pid 5070] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5069] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5070] set_robust_list(0x7f81bb1be9a0, 24 [pid 5069] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5070] <... set_robust_list resumed>) = 0 [pid 5069] <... futex resumed>) = 0 [pid 5070] rt_sigprocmask(SIG_SETMASK, [], [pid 5069] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5070] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5069] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5070] memfd_create("syzkaller", 0 [pid 5069] <... mmap resumed>) = 0x7f81bb17d000 [pid 5069] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5069] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5069] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5071 attached [pid 5071] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5069] <... clone3 resumed> => {parent_tid=[5071]}, 88) = 5071 [pid 5071] set_robust_list(0x7f81bb19d9a0, 24 [pid 5069] rt_sigprocmask(SIG_SETMASK, [], [pid 5071] <... set_robust_list resumed>) = 0 [pid 5069] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5071] rt_sigprocmask(SIG_SETMASK, [], [pid 5069] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5071] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5069] <... futex resumed>) = 0 [pid 5071] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5069] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5071] <... open resumed>) = 3 [pid 5071] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5069] <... futex resumed>) = 0 [pid 5069] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5069] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5071] <... futex resumed>) = 1 [pid 5071] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5071] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5069] <... futex resumed>) = 0 [pid 5069] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5069] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5071] <... futex resumed>) = 1 [pid 5071] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 4 [pid 5071] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5069] <... futex resumed>) = 0 [pid 5069] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 53.050471][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5069] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5071] <... futex resumed>) = 1 [pid 5071] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5071] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5069] <... futex resumed>) = 0 [pid 5071] <... futex resumed>) = 1 [pid 5071] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5070] <... memfd_create resumed>) = 5 [pid 5070] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5070] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5070] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5070] ioctl(6, LOOP_SET_FD, 5) = 0 [pid 5070] close(5) = 0 [pid 5070] mkdir("./file1", 0777) = 0 [ 53.118938][ T5070] loop0: detected capacity change from 0 to 512 [ 53.138316][ T5070] EXT4-fs (loop0): 1 orphan inode deleted [ 53.144097][ T5070] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 53.156904][ T5070] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/10/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5070] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5070] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 5 [pid 5070] chdir("./file1") = 0 [pid 5070] ioctl(6, LOOP_CLR_FD) = 0 [pid 5070] close(6) = 0 [pid 5070] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5069] exit_group(0 [pid 5071] <... futex resumed>) = ? [pid 5069] <... exit_group resumed>) = ? [pid 5071] +++ exited with 0 +++ [pid 5070] <... futex resumed>) = ? [pid 5070] +++ exited with 0 +++ [pid 5069] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5069, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./10", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./10/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./10/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/bus") = 0 umount2("./10/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/binderfs") = 0 umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./10/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./10") = 0 mkdir("./11", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5074 attached , child_tidptr=0x555556eda690) = 5074 [pid 5074] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5074] chdir("./11") = 0 [pid 5074] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5074] setpgid(0, 0) = 0 [pid 5074] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5074] write(3, "1000", 4) = 4 [pid 5074] close(3) = 0 [pid 5074] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5074] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5074] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5074] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5074] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5074] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5074] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5074] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5075 attached => {parent_tid=[5075]}, 88) = 5075 [pid 5075] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5074] rt_sigprocmask(SIG_SETMASK, [], [pid 5075] <... rseq resumed>) = 0 [pid 5074] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5075] set_robust_list(0x7f81bb1be9a0, 24 [pid 5074] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5075] <... set_robust_list resumed>) = 0 [pid 5074] <... futex resumed>) = 0 [pid 5075] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5074] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5075] memfd_create("syzkaller", 0 [pid 5074] <... futex resumed>) = 0 [pid 5074] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5075] <... memfd_create resumed>) = 3 [pid 5074] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5075] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5074] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5075] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5074] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5076 attached [pid 5075] <... write resumed>) = 262144 [pid 5076] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5075] munmap(0x7f81b2d7d000, 262144 [pid 5074] <... clone3 resumed> => {parent_tid=[5076]}, 88) = 5076 [pid 5076] <... rseq resumed>) = 0 [pid 5074] rt_sigprocmask(SIG_SETMASK, [], [pid 5076] set_robust_list(0x7f81bb19d9a0, 24 [pid 5075] <... munmap resumed>) = 0 [pid 5074] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5076] <... set_robust_list resumed>) = 0 [pid 5075] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5076] rt_sigprocmask(SIG_SETMASK, [], [pid 5074] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5075] <... openat resumed>) = 4 [pid 5074] <... futex resumed>) = 0 [pid 5076] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5075] ioctl(4, LOOP_SET_FD, 3 [pid 5074] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5076] <... open resumed>) = 5 [pid 5076] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5074] <... futex resumed>) = 0 [pid 5074] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5074] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5075] <... ioctl resumed>) = 0 [pid 5075] close(3) = 0 [pid 5075] mkdir("./file1", 0777 [pid 5076] <... futex resumed>) = 1 [pid 5075] <... mkdir resumed>) = 0 [pid 5075] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5076] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5076] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5074] <... futex resumed>) = 0 [pid 5074] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5074] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5076] <... futex resumed>) = 1 [pid 5076] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 3 [pid 5076] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5074] <... futex resumed>) = 0 [pid 5074] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5074] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5076] <... futex resumed>) = 1 [ 53.182155][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 53.221265][ T5075] loop0: detected capacity change from 0 to 512 [pid 5076] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 262144 [pid 5076] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5074] <... futex resumed>) = 0 [pid 5076] <... futex resumed>) = 1 [pid 5076] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5075] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5075] ioctl(4, LOOP_CLR_FD) = 0 [pid 5075] close(4) = 0 [pid 5075] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5075] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5074] exit_group(0) = ? [pid 5075] <... futex resumed>) = ? [pid 5075] +++ exited with 0 +++ [pid 5076] <... futex resumed>) = ? [pid 5076] +++ exited with 0 +++ [pid 5074] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5074, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./11", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./11/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./11/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/bus") = 0 umount2("./11/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/binderfs") = 0 umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./11/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./11") = 0 mkdir("./12", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5077 attached [pid 5077] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5077] chdir("./12") = 0 [pid 5077] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5077 [pid 5077] setpgid(0, 0) = 0 [pid 5077] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5077] write(3, "1000", 4) = 4 [pid 5077] close(3) = 0 [pid 5077] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5077] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5077] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5077] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5077] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5077] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5077] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5077] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5078 attached [pid 5078] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5077] <... clone3 resumed> => {parent_tid=[5078]}, 88) = 5078 [pid 5078] <... rseq resumed>) = 0 [pid 5077] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5077] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5077] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5078] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5078] rt_sigprocmask(SIG_SETMASK, [], [pid 5077] <... futex resumed>) = 0 [pid 5078] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5077] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5078] memfd_create("syzkaller", 0) = 3 [pid 5077] <... mmap resumed>) = 0x7f81bb17d000 [pid 5078] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5077] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5078] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5077] <... mprotect resumed>) = 0 [ 53.238206][ T5075] EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 overlaps superblock [ 53.250508][ T5075] EXT4-fs (loop0): group descriptors corrupted! [pid 5077] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5077] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5078] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5077] <... clone3 resumed> => {parent_tid=[5079]}, 88) = 5079 [pid 5077] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5077] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5077] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5078] <... write resumed>) = 262144 ./strace-static-x86_64: Process 5079 attached [pid 5079] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5078] munmap(0x7f81b2d7d000, 262144 [pid 5079] <... rseq resumed>) = 0 [pid 5078] <... munmap resumed>) = 0 [pid 5079] set_robust_list(0x7f81bb19d9a0, 24 [pid 5078] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5079] <... set_robust_list resumed>) = 0 [pid 5079] rt_sigprocmask(SIG_SETMASK, [], [pid 5078] <... openat resumed>) = 4 [pid 5079] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5079] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5078] ioctl(4, LOOP_SET_FD, 3 [pid 5079] <... open resumed>) = 5 [pid 5079] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5077] <... futex resumed>) = 0 [pid 5079] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5077] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5079] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5077] <... futex resumed>) = 0 [pid 5077] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5079] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5077] <... futex resumed>) = 0 [pid 5079] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5077] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5079] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5077] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5079] <... open resumed>) = 6 [pid 5079] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5077] <... futex resumed>) = 0 [pid 5077] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5079] <... futex resumed>) = 1 [pid 5077] <... futex resumed>) = 0 [pid 5079] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5077] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5078] <... ioctl resumed>) = 0 [pid 5078] close(3) = 0 [pid 5078] mkdir("./file1", 0777) = 0 [pid 5078] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5079] <... write resumed>) = 262144 [pid 5079] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5079] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5077] <... futex resumed>) = 0 [pid 5078] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5078] ioctl(4, LOOP_CLR_FD) = 0 [pid 5078] close(4) = 0 [pid 5078] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5078] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5077] exit_group(0 [pid 5079] <... futex resumed>) = ? [pid 5079] +++ exited with 0 +++ [pid 5077] <... exit_group resumed>) = ? [pid 5078] <... futex resumed>) = ? [pid 5078] +++ exited with 0 +++ [pid 5077] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5077, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./12", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./12/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./12/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/bus") = 0 umount2("./12/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/binderfs") = 0 umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./12/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./12") = 0 mkdir("./13", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5080 ./strace-static-x86_64: Process 5080 attached [pid 5080] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5080] chdir("./13") = 0 [pid 5080] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5080] setpgid(0, 0) = 0 [pid 5080] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "1000", 4) = 4 [pid 5080] close(3) = 0 [ 53.306604][ T5078] loop0: detected capacity change from 0 to 512 [ 53.320869][ T5078] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5080] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5080] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5080] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5080] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5080] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5080] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5080] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5080] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5081 attached => {parent_tid=[5081]}, 88) = 5081 [pid 5081] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5080] rt_sigprocmask(SIG_SETMASK, [], [pid 5081] <... rseq resumed>) = 0 [pid 5081] set_robust_list(0x7f81bb1be9a0, 24 [pid 5080] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5081] <... set_robust_list resumed>) = 0 [pid 5080] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5081] rt_sigprocmask(SIG_SETMASK, [], [pid 5080] <... futex resumed>) = 0 [pid 5081] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5080] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5081] memfd_create("syzkaller", 0 [pid 5080] <... futex resumed>) = 0 [pid 5081] <... memfd_create resumed>) = 3 [pid 5081] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5080] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81b2d7d000 [pid 5080] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5081] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5080] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5080] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0}./strace-static-x86_64: Process 5082 attached [pid 5082] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053 [pid 5080] <... clone3 resumed> => {parent_tid=[5082]}, 88) = 5082 [pid 5082] <... rseq resumed>) = 0 [pid 5082] set_robust_list(0x7f81b2d9d9a0, 24) = 0 [pid 5080] rt_sigprocmask(SIG_SETMASK, [], [pid 5082] rt_sigprocmask(SIG_SETMASK, [], [pid 5080] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5082] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5082] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5080] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5082] <... open resumed>) = 4 [pid 5080] <... futex resumed>) = 0 [pid 5082] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5082] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5081] <... write resumed>) = 262144 [pid 5080] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5081] munmap(0x7f81b2d9e000, 262144 [pid 5080] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5080] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5082] <... futex resumed>) = 0 [pid 5080] <... futex resumed>) = 1 [pid 5082] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5080] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5082] <... mount resumed>) = 0 [pid 5081] <... munmap resumed>) = 0 [pid 5082] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5081] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5082] <... futex resumed>) = 1 [pid 5080] <... futex resumed>) = 0 [pid 5082] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5080] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5082] <... open resumed>) = 5 [pid 5081] <... openat resumed>) = 6 [pid 5080] <... futex resumed>) = 0 [pid 5082] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5080] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5082] <... futex resumed>) = 0 [pid 5080] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5082] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5080] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5082] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5080] <... futex resumed>) = 0 [pid 5082] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5080] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5082] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5082] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5081] ioctl(6, LOOP_SET_FD, 3 [pid 5082] <... futex resumed>) = 1 [pid 5081] <... ioctl resumed>) = 0 [pid 5080] <... futex resumed>) = 0 [pid 5082] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5081] close(3) = 0 [pid 5081] mkdir("./file1", 0777) = 0 [ 53.385910][ T5081] loop0: detected capacity change from 0 to 512 [ 53.408134][ T5081] EXT4-fs (loop0): 1 orphan inode deleted [ 53.414068][ T5081] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5081] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5081] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5081] chdir("./file1") = 0 [pid 5081] ioctl(6, LOOP_CLR_FD) = 0 [pid 5081] close(6) = 0 [pid 5081] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5081] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5080] exit_group(0 [pid 5081] <... futex resumed>) = ? [pid 5080] <... exit_group resumed>) = ? [pid 5082] <... futex resumed>) = ? [pid 5081] +++ exited with 0 +++ [pid 5082] +++ exited with 0 +++ [pid 5080] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5080, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./13", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./13/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./13/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/bus") = 0 umount2("./13/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/binderfs") = 0 [ 53.427010][ T5081] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/13/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./13/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./13") = 0 mkdir("./14", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5085 attached , child_tidptr=0x555556eda690) = 5085 [pid 5085] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5085] chdir("./14") = 0 [pid 5085] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5085] setpgid(0, 0) = 0 [pid 5085] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5085] write(3, "1000", 4) = 4 [pid 5085] close(3) = 0 [pid 5085] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5085] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5085] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5085] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5085] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5085] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5085] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5085] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5086]}, 88) = 5086 [pid 5085] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5085] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5085] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5085] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5085] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5085] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5085] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5087 attached => {parent_tid=[5087]}, 88) = 5087 [pid 5085] rt_sigprocmask(SIG_SETMASK, [], [pid 5087] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5085] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5087] <... rseq resumed>) = 0 [pid 5087] set_robust_list(0x7f81bb19d9a0, 24 [pid 5085] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5087] <... set_robust_list resumed>) = 0 [pid 5085] <... futex resumed>) = 0 [pid 5087] rt_sigprocmask(SIG_SETMASK, [], [pid 5085] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5087] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5087] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000./strace-static-x86_64: Process 5086 attached ) = 3 [pid 5087] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5086] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5087] <... futex resumed>) = 1 [pid 5086] <... rseq resumed>) = 0 [pid 5086] set_robust_list(0x7f81bb1be9a0, 24 [pid 5085] <... futex resumed>) = 0 [pid 5087] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5086] <... set_robust_list resumed>) = 0 [pid 5085] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5086] rt_sigprocmask(SIG_SETMASK, [], [pid 5087] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5086] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5085] <... futex resumed>) = 0 [pid 5087] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5086] memfd_create("syzkaller", 0 [pid 5085] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5086] <... memfd_create resumed>) = 4 [pid 5087] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5086] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5087] <... futex resumed>) = 1 [pid 5086] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5085] <... futex resumed>) = 0 [pid 5085] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5087] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5085] <... futex resumed>) = 0 [pid 5087] <... open resumed>) = 5 [pid 5085] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5087] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5085] <... futex resumed>) = 0 [pid 5085] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5087] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5085] <... futex resumed>) = 0 [pid 5087] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5085] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5087] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5085] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5087] <... futex resumed>) = 0 [pid 5086] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5087] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5086] <... write resumed>) = 262144 [pid 5086] munmap(0x7f81b2d7d000, 262144) = 0 [ 53.459827][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5086] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5086] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5086] close(4) = 0 [pid 5086] mkdir("./file1", 0777) = 0 [pid 5086] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5086] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5086] chdir("./file1") = 0 [pid 5086] ioctl(6, LOOP_CLR_FD) = 0 [pid 5086] close(6) = 0 [pid 5086] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5086] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5085] exit_group(0 [pid 5087] <... futex resumed>) = ? [pid 5087] +++ exited with 0 +++ [pid 5086] <... futex resumed>) = ? [pid 5085] <... exit_group resumed>) = ? [pid 5086] +++ exited with 0 +++ [pid 5085] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5085, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./14", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./14/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./14/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/bus") = 0 umount2("./14/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/binderfs") = 0 [ 53.510610][ T5086] loop0: detected capacity change from 0 to 512 [ 53.528178][ T5086] EXT4-fs (loop0): 1 orphan inode deleted [ 53.533948][ T5086] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 53.546608][ T5086] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/14/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./14/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./14") = 0 mkdir("./15", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5090 attached , child_tidptr=0x555556eda690) = 5090 [pid 5090] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5090] chdir("./15") = 0 [pid 5090] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5090] setpgid(0, 0) = 0 [pid 5090] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5090] write(3, "1000", 4) = 4 [pid 5090] close(3) = 0 [pid 5090] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5090] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5090] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5090] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5090] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5090] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5090] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5090] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5091 attached => {parent_tid=[5091]}, 88) = 5091 [pid 5090] rt_sigprocmask(SIG_SETMASK, [], [pid 5091] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5090] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5091] <... rseq resumed>) = 0 [pid 5091] set_robust_list(0x7f81bb1be9a0, 24 [pid 5090] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5091] <... set_robust_list resumed>) = 0 [pid 5090] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5091] rt_sigprocmask(SIG_SETMASK, [], [pid 5090] <... futex resumed>) = 0 [pid 5090] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5091] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5090] <... mmap resumed>) = 0x7f81bb17d000 [pid 5091] memfd_create("syzkaller", 0 [pid 5090] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5091] <... memfd_create resumed>) = 3 [pid 5091] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5090] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5091] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5090] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5090] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5092]}, 88) = 5092 ./strace-static-x86_64: Process 5092 attached [pid 5091] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5092] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5092] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5090] rt_sigprocmask(SIG_SETMASK, [], [pid 5092] rt_sigprocmask(SIG_SETMASK, [], [pid 5090] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5092] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5092] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5090] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5092] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5092] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5090] <... futex resumed>) = 0 [pid 5091] <... write resumed>) = 262144 [pid 5090] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5092] <... open resumed>) = 4 [pid 5091] munmap(0x7f81b2d7d000, 262144 [pid 5092] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5090] <... futex resumed>) = 0 [pid 5091] <... munmap resumed>) = 0 [pid 5090] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5091] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5090] <... futex resumed>) = 0 [pid 5091] <... openat resumed>) = 5 [pid 5090] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5091] ioctl(5, LOOP_SET_FD, 3 [pid 5092] <... futex resumed>) = 1 [ 53.576269][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5092] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5092] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5092] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5090] <... futex resumed>) = 0 [pid 5090] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5090] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5092] <... futex resumed>) = 0 [pid 5092] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5092] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5090] <... futex resumed>) = 0 [pid 5092] <... futex resumed>) = 1 [pid 5092] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5090] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5091] <... ioctl resumed>) = 0 [pid 5092] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5090] <... futex resumed>) = 0 [pid 5092] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5090] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5091] close(3) = 0 [pid 5091] mkdir("./file1", 0777) = 0 [pid 5091] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5092] <... write resumed>) = 262144 [pid 5092] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5090] <... futex resumed>) = 0 [pid 5092] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5091] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5091] ioctl(5, LOOP_CLR_FD) = 0 [pid 5091] close(5) = 0 [pid 5091] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5091] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5090] exit_group(0 [pid 5092] <... futex resumed>) = ? [pid 5091] <... futex resumed>) = ? [pid 5090] <... exit_group resumed>) = ? [pid 5092] +++ exited with 0 +++ [pid 5091] +++ exited with 0 +++ [pid 5090] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5090, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./15", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./15/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./15/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/bus") = 0 umount2("./15/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/binderfs") = 0 umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./15/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./15") = 0 mkdir("./16", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 [ 53.630901][ T5091] loop0: detected capacity change from 0 to 512 [ 53.646163][ T5091] EXT4-fs (loop0): VFS: Can't find ext4 filesystem clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5093 ./strace-static-x86_64: Process 5093 attached [pid 5093] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5093] chdir("./16") = 0 [pid 5093] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5093] setpgid(0, 0) = 0 [pid 5093] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5093] write(3, "1000", 4) = 4 [pid 5093] close(3) = 0 [pid 5093] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5093] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5093] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5093] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5093] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5093] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5093] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5094]}, 88) = 5094 [pid 5093] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5093] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5093] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5093] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5093] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5095]}, 88) = 5095 [pid 5093] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5093] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5094 attached ./strace-static-x86_64: Process 5095 attached [pid 5094] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5095] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5094] <... rseq resumed>) = 0 [pid 5095] <... rseq resumed>) = 0 [pid 5095] set_robust_list(0x7f81bb19d9a0, 24 [pid 5094] set_robust_list(0x7f81bb1be9a0, 24 [pid 5095] <... set_robust_list resumed>) = 0 [pid 5094] <... set_robust_list resumed>) = 0 [pid 5095] rt_sigprocmask(SIG_SETMASK, [], [pid 5094] rt_sigprocmask(SIG_SETMASK, [], [pid 5095] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5094] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5095] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5094] memfd_create("syzkaller", 0) = 4 [pid 5094] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5095] <... open resumed>) = 3 [pid 5095] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5094] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5093] <... futex resumed>) = 0 [pid 5093] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5095] <... futex resumed>) = 1 [pid 5095] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5094] <... write resumed>) = 262144 [pid 5095] <... mount resumed>) = 0 [pid 5094] munmap(0x7f81b2d7d000, 262144 [pid 5095] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5094] <... munmap resumed>) = 0 [pid 5093] <... futex resumed>) = 0 [pid 5094] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5093] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5095] <... futex resumed>) = 1 [pid 5094] <... openat resumed>) = 5 [pid 5095] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5094] ioctl(5, LOOP_SET_FD, 4 [pid 5095] <... open resumed>) = 6 [pid 5095] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5093] <... futex resumed>) = 0 [pid 5093] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5095] <... futex resumed>) = 1 [pid 5095] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5094] <... ioctl resumed>) = 0 [pid 5094] close(4) = 0 [pid 5094] mkdir("./file1", 0777) = 0 [pid 5094] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5095] <... write resumed>) = 262144 [pid 5095] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5093] <... futex resumed>) = 0 [pid 5095] <... futex resumed>) = 1 [pid 5095] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5094] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5094] ioctl(5, LOOP_CLR_FD) = 0 [pid 5094] close(5) = 0 [pid 5094] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5094] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5093] exit_group(0 [pid 5094] <... futex resumed>) = ? [pid 5095] <... futex resumed>) = ? [pid 5093] <... exit_group resumed>) = ? [pid 5095] +++ exited with 0 +++ [pid 5094] +++ exited with 0 +++ [pid 5093] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5093, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./16", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./16/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./16/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/bus") = 0 umount2("./16/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/binderfs") = 0 umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./16/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./16") = 0 mkdir("./17", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5096 ./strace-static-x86_64: Process 5096 attached [pid 5096] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5096] chdir("./17") = 0 [pid 5096] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5096] setpgid(0, 0) = 0 [pid 5096] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5096] write(3, "1000", 4) = 4 [pid 5096] close(3) = 0 [pid 5096] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5096] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5096] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5096] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5096] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5096] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5096] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5096] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5097 attached [pid 5097] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5096] <... clone3 resumed> => {parent_tid=[5097]}, 88) = 5097 [pid 5097] <... rseq resumed>) = 0 [pid 5096] rt_sigprocmask(SIG_SETMASK, [], [pid 5097] set_robust_list(0x7f81bb1be9a0, 24 [pid 5096] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5097] <... set_robust_list resumed>) = 0 [pid 5096] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5097] rt_sigprocmask(SIG_SETMASK, [], [pid 5096] <... futex resumed>) = 0 [pid 5097] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5096] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5097] memfd_create("syzkaller", 0 [pid 5096] <... futex resumed>) = 0 [pid 5097] <... memfd_create resumed>) = 3 [pid 5096] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5097] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5096] <... mmap resumed>) = 0x7f81bb17d000 [pid 5097] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5096] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5096] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5096] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5098 attached [pid 5097] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5098] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5096] <... clone3 resumed> => {parent_tid=[5098]}, 88) = 5098 [pid 5096] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [ 53.712955][ T5094] loop0: detected capacity change from 0 to 512 [ 53.725945][ T5094] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5096] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5096] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5098] <... rseq resumed>) = 0 [pid 5097] <... write resumed>) = 262144 [pid 5098] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5097] munmap(0x7f81b2d7d000, 262144 [pid 5098] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5097] <... munmap resumed>) = 0 [pid 5098] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5097] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5098] <... open resumed>) = 4 [pid 5097] ioctl(5, LOOP_SET_FD, 3 [pid 5098] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5098] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5097] <... ioctl resumed>) = 0 [pid 5096] <... futex resumed>) = 0 [pid 5097] close(3 [pid 5096] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5098] <... futex resumed>) = 0 [pid 5097] <... close resumed>) = 0 [pid 5096] <... futex resumed>) = 1 [pid 5098] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5097] mkdir("./file1", 0777 [pid 5096] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5098] <... mount resumed>) = 0 [pid 5097] <... mkdir resumed>) = 0 [pid 5097] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5098] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5096] <... futex resumed>) = 0 [pid 5098] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5096] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5098] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5096] <... futex resumed>) = 0 [pid 5096] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5098] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 3 [pid 5098] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5096] <... futex resumed>) = 0 [pid 5098] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5096] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5098] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5096] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 53.777593][ T5097] loop0: detected capacity change from 0 to 512 [ 53.797608][ T5097] EXT4-fs (loop0): 1 orphan inode deleted [ 53.803349][ T5097] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5098] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 262144 [pid 5098] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5096] <... futex resumed>) = 0 [pid 5098] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5097] <... mount resumed>) = 0 [pid 5097] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 6 [pid 5097] chdir("./file1") = 0 [pid 5097] ioctl(5, LOOP_CLR_FD) = 0 [pid 5097] close(5) = 0 [pid 5097] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5096] exit_group(0 [pid 5098] <... futex resumed>) = ? [pid 5097] <... futex resumed>) = ? [pid 5096] <... exit_group resumed>) = ? [pid 5098] +++ exited with 0 +++ [pid 5097] +++ exited with 0 +++ [pid 5096] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5096, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./17", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./17/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./17/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/bus") = 0 umount2("./17/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/binderfs") = 0 [ 53.817351][ T5097] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/17/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./17/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./17/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./17") = 0 mkdir("./18", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5101 ./strace-static-x86_64: Process 5101 attached [pid 5101] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5101] chdir("./18") = 0 [pid 5101] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5101] setpgid(0, 0) = 0 [pid 5101] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5101] write(3, "1000", 4) = 4 [pid 5101] close(3) = 0 [pid 5101] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5101] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5101] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [ 53.850102][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 53.860516][ T5024] EXT4-fs error (device loop0): __ext4_get_inode_loc:4379: comm syz-executor212: Invalid inode table block 0 in block_group 0 [ 53.873908][ T5024] EXT4-fs error (device loop0) in ext4_reserve_inode_write:5752: Corrupt filesystem [ 53.884113][ T5024] EXT4-fs error (device loop0): ext4_quota_off:7131: inode #3: comm syz-executor212: mark_inode_dirty error [pid 5101] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5101] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5101] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5101] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5102 attached => {parent_tid=[5102]}, 88) = 5102 [pid 5101] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5101] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5101] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5102] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5102] set_robust_list(0x7f81bb1be9a0, 24 [pid 5101] <... mmap resumed>) = 0x7f81bb17d000 [pid 5101] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5102] <... set_robust_list resumed>) = 0 [pid 5101] <... mprotect resumed>) = 0 [pid 5102] rt_sigprocmask(SIG_SETMASK, [], [pid 5101] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5101] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5102] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5102] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5103 attached [pid 5101] <... clone3 resumed> => {parent_tid=[5103]}, 88) = 5103 [pid 5101] rt_sigprocmask(SIG_SETMASK, [], [pid 5103] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5102] <... memfd_create resumed>) = 3 [pid 5101] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5101] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5103] <... rseq resumed>) = 0 [pid 5102] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5101] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5103] set_robust_list(0x7f81bb19d9a0, 24 [pid 5102] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5103] <... set_robust_list resumed>) = 0 [pid 5103] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5103] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5102] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5103] <... open resumed>) = 4 [pid 5103] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5103] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5101] <... futex resumed>) = 0 [pid 5101] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5103] <... futex resumed>) = 0 [pid 5103] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5101] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5103] <... mount resumed>) = 0 [pid 5103] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5101] <... futex resumed>) = 0 [pid 5101] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5103] <... futex resumed>) = 1 [pid 5102] <... write resumed>) = 262144 [pid 5103] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5102] munmap(0x7f81b2d7d000, 262144 [pid 5101] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5103] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5101] <... futex resumed>) = 0 [pid 5103] <... futex resumed>) = 1 [pid 5103] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5102] <... munmap resumed>) = 0 [pid 5101] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5103] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5102] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5101] <... futex resumed>) = 0 [pid 5103] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5101] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5103] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5102] <... openat resumed>) = 6 [pid 5103] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5102] ioctl(6, LOOP_SET_FD, 3 [pid 5101] <... futex resumed>) = 0 [pid 5103] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5102] <... ioctl resumed>) = 0 [pid 5102] close(3) = 0 [pid 5102] mkdir("./file1", 0777) = 0 [ 53.946299][ T5102] loop0: detected capacity change from 0 to 512 [ 53.968324][ T5102] EXT4-fs (loop0): 1 orphan inode deleted [ 53.974144][ T5102] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5102] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5102] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5102] chdir("./file1") = 0 [pid 5102] ioctl(6, LOOP_CLR_FD) = 0 [pid 5102] close(6) = 0 [pid 5102] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5102] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5101] exit_group(0) = ? [pid 5103] <... futex resumed>) = ? [pid 5102] <... futex resumed>) = ? [pid 5102] +++ exited with 0 +++ [pid 5103] +++ exited with 0 +++ [pid 5101] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5101, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./18", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./18/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./18/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/bus") = 0 umount2("./18/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/binderfs") = 0 umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./18/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./18") = 0 mkdir("./19", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5106 ./strace-static-x86_64: Process 5106 attached [pid 5106] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5106] chdir("./19") = 0 [pid 5106] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5106] setpgid(0, 0) = 0 [pid 5106] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5106] write(3, "1000", 4) = 4 [pid 5106] close(3) = 0 [pid 5106] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5106] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5106] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5106] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5106] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5106] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5106] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5106] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5107 attached => {parent_tid=[5107]}, 88) = 5107 [pid 5106] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5106] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5107] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5106] <... futex resumed>) = 0 [pid 5107] <... rseq resumed>) = 0 [pid 5106] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5107] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5107] rt_sigprocmask(SIG_SETMASK, [], [ 53.987070][ T5102] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/18/file1 supports timestamps until 2038-01-19 (0x7fffffff) [ 54.016144][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5106] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5107] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5106] <... mmap resumed>) = 0x7f81bb17d000 [pid 5107] memfd_create("syzkaller", 0) = 3 [pid 5107] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5106] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5106] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5106] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5108 attached [pid 5107] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5108] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5108] set_robust_list(0x7f81bb19d9a0, 24 [pid 5106] <... clone3 resumed> => {parent_tid=[5108]}, 88) = 5108 [pid 5108] <... set_robust_list resumed>) = 0 [pid 5108] rt_sigprocmask(SIG_SETMASK, [], [pid 5107] <... write resumed>) = 262144 [pid 5106] rt_sigprocmask(SIG_SETMASK, [], [pid 5108] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5106] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5108] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5106] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5108] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5107] munmap(0x7f81b2d7d000, 262144 [pid 5108] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5106] <... futex resumed>) = 0 [pid 5106] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5107] <... munmap resumed>) = 0 [pid 5107] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5107] ioctl(5, LOOP_SET_FD, 3 [pid 5108] <... open resumed>) = 4 [pid 5108] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5106] <... futex resumed>) = 0 [pid 5106] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5106] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5108] <... futex resumed>) = 1 [pid 5108] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5108] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5106] <... futex resumed>) = 0 [pid 5106] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5108] <... futex resumed>) = 1 [pid 5106] <... futex resumed>) = 0 [pid 5108] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5106] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5108] <... open resumed>) = 6 [pid 5108] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5106] <... futex resumed>) = 0 [pid 5106] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5108] <... futex resumed>) = 1 [pid 5108] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5106] <... futex resumed>) = 0 [pid 5107] <... ioctl resumed>) = 0 [pid 5106] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5107] close(3) = 0 [pid 5107] mkdir("./file1", 0777) = 0 [pid 5107] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5108] <... write resumed>) = 262144 [pid 5108] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5106] <... futex resumed>) = 0 [pid 5108] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5107] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5107] ioctl(5, LOOP_CLR_FD) = 0 [pid 5107] close(5) = 0 [pid 5107] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5107] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5106] exit_group(0 [pid 5107] <... futex resumed>) = ? [pid 5108] <... futex resumed>) = ? [pid 5106] <... exit_group resumed>) = ? [pid 5108] +++ exited with 0 +++ [pid 5107] +++ exited with 0 +++ [pid 5106] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5106, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./19", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./19/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./19/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/bus") = 0 umount2("./19/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/binderfs") = 0 umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./19/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./19") = 0 mkdir("./20", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [ 54.091779][ T5107] loop0: detected capacity change from 0 to 512 [ 54.106818][ T5107] EXT4-fs (loop0): VFS: Can't find ext4 filesystem close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5109 attached , child_tidptr=0x555556eda690) = 5109 [pid 5109] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5109] chdir("./20") = 0 [pid 5109] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5109] setpgid(0, 0) = 0 [pid 5109] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5109] write(3, "1000", 4) = 4 [pid 5109] close(3) = 0 [pid 5109] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5109] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5109] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5109] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5109] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5109] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5109] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5109] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5110 attached [pid 5110] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5109] <... clone3 resumed> => {parent_tid=[5110]}, 88) = 5110 [pid 5110] <... rseq resumed>) = 0 [pid 5109] rt_sigprocmask(SIG_SETMASK, [], [pid 5110] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5109] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5110] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5109] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5110] memfd_create("syzkaller", 0 [pid 5109] <... futex resumed>) = 0 [pid 5109] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5110] <... memfd_create resumed>) = 3 [pid 5109] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5110] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5109] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5110] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5109] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5110] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5109] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5109] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5111 attached => {parent_tid=[5111]}, 88) = 5111 [pid 5109] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5111] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5109] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5109] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5111] <... rseq resumed>) = 0 [pid 5111] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5111] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5111] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5110] <... write resumed>) = 262144 [pid 5111] <... open resumed>) = 4 [pid 5110] munmap(0x7f81b2d7d000, 262144 [pid 5111] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5110] <... munmap resumed>) = 0 [pid 5111] <... futex resumed>) = 1 [pid 5109] <... futex resumed>) = 0 [pid 5111] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5109] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5111] <... mount resumed>) = 0 [pid 5109] <... futex resumed>) = 0 [pid 5109] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5110] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5111] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5109] <... futex resumed>) = 0 [pid 5111] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5110] ioctl(5, LOOP_SET_FD, 3 [pid 5109] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5111] <... futex resumed>) = 0 [pid 5110] <... ioctl resumed>) = 0 [pid 5109] <... futex resumed>) = 1 [pid 5111] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5109] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5111] <... open resumed>) = 6 [pid 5111] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5109] <... futex resumed>) = 0 [pid 5111] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5109] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5109] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5110] close(3) = 0 [pid 5110] mkdir("./file1", 0777) = 0 [pid 5110] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5111] <... write resumed>) = 262144 [pid 5111] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5109] <... futex resumed>) = 0 [pid 5111] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5110] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5110] ioctl(5, LOOP_CLR_FD) = 0 [pid 5110] close(5) = 0 [pid 5110] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5110] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5109] exit_group(0 [pid 5111] <... futex resumed>) = ? [pid 5111] +++ exited with 0 +++ [pid 5110] <... futex resumed>) = ? [pid 5109] <... exit_group resumed>) = ? [pid 5110] +++ exited with 0 +++ [pid 5109] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5109, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./20", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./20/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./20/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/bus") = 0 umount2("./20/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/binderfs") = 0 umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./20/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./20") = 0 mkdir("./21", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5112 attached , child_tidptr=0x555556eda690) = 5112 [pid 5112] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5112] chdir("./21") = 0 [pid 5112] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5112] setpgid(0, 0) = 0 [ 54.195401][ T5110] loop0: detected capacity change from 0 to 512 [ 54.211460][ T5110] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5112] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5112] write(3, "1000", 4) = 4 [pid 5112] close(3) = 0 [pid 5112] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5112] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5112] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5112] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5112] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5112] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5112] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5112] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5113 attached => {parent_tid=[5113]}, 88) = 5113 [pid 5112] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5113] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5112] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5113] <... rseq resumed>) = 0 [pid 5112] <... futex resumed>) = 0 [pid 5113] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5112] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5113] rt_sigprocmask(SIG_SETMASK, [], [pid 5112] <... futex resumed>) = 0 [pid 5113] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5113] memfd_create("syzkaller", 0 [pid 5112] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5113] <... memfd_create resumed>) = 3 [pid 5112] <... mmap resumed>) = 0x7f81bb17d000 [pid 5113] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5112] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5113] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5112] <... mprotect resumed>) = 0 [pid 5112] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5112] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5114 attached [pid 5113] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5114] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5112] <... clone3 resumed> => {parent_tid=[5114]}, 88) = 5114 [pid 5112] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5112] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5112] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5114] set_robust_list(0x7f81bb19d9a0, 24 [pid 5113] <... write resumed>) = 262144 [pid 5114] <... set_robust_list resumed>) = 0 [pid 5113] munmap(0x7f81b2d7d000, 262144 [pid 5114] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5113] <... munmap resumed>) = 0 [pid 5114] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5113] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5114] <... open resumed>) = 4 [pid 5113] ioctl(5, LOOP_SET_FD, 3 [pid 5114] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5114] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5112] <... futex resumed>) = 0 [pid 5112] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5114] <... futex resumed>) = 0 [pid 5112] <... futex resumed>) = 1 [pid 5114] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5112] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5114] <... mount resumed>) = 0 [pid 5113] <... ioctl resumed>) = 0 [pid 5114] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5113] close(3 [pid 5112] <... futex resumed>) = 0 [pid 5114] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5112] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5114] <... futex resumed>) = 0 [pid 5112] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5114] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5113] <... close resumed>) = 0 [pid 5113] mkdir("./file1", 0777 [pid 5114] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5112] <... futex resumed>) = 0 [pid 5114] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5112] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5114] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5112] <... futex resumed>) = 0 [pid 5114] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5112] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5113] <... mkdir resumed>) = 0 [pid 5113] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5114] <... write resumed>) = 262144 [pid 5114] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5112] <... futex resumed>) = 0 [pid 5114] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5113] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5113] ioctl(5, LOOP_CLR_FD) = 0 [pid 5113] close(5) = 0 [pid 5113] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5113] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5112] exit_group(0 [pid 5114] <... futex resumed>) = ? [pid 5112] <... exit_group resumed>) = ? [pid 5114] +++ exited with 0 +++ [pid 5113] <... futex resumed>) = ? [pid 5113] +++ exited with 0 +++ [pid 5112] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5112, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./21", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./21/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./21/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/bus") = 0 umount2("./21/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/binderfs") = 0 umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./21/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./21") = 0 mkdir("./22", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5115 attached , child_tidptr=0x555556eda690) = 5115 [pid 5115] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5115] chdir("./22") = 0 [pid 5115] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5115] setpgid(0, 0) = 0 [pid 5115] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5115] write(3, "1000", 4) = 4 [pid 5115] close(3) = 0 [pid 5115] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5115] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5115] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5115] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5115] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5115] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5115] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5115] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5116 attached => {parent_tid=[5116]}, 88) = 5116 [pid 5116] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5115] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5116] set_robust_list(0x7f81bb1be9a0, 24 [pid 5115] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5116] <... set_robust_list resumed>) = 0 [pid 5116] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5116] memfd_create("syzkaller", 0 [pid 5115] <... futex resumed>) = 0 [pid 5115] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5115] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5116] <... memfd_create resumed>) = 3 [pid 5116] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5115] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5116] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5115] <... mprotect resumed>) = 0 [pid 5116] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5115] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5115] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5117 attached [pid 5117] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5115] <... clone3 resumed> => {parent_tid=[5117]}, 88) = 5117 [pid 5117] <... rseq resumed>) = 0 [pid 5115] rt_sigprocmask(SIG_SETMASK, [], [pid 5117] set_robust_list(0x7f81bb19d9a0, 24 [pid 5115] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5117] <... set_robust_list resumed>) = 0 [pid 5115] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5117] rt_sigprocmask(SIG_SETMASK, [], [pid 5115] <... futex resumed>) = 0 [pid 5117] <... rt_sigprocmask resumed>NULL, 8) = 0 [ 54.271507][ T5113] loop0: detected capacity change from 0 to 512 [ 54.292830][ T5113] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5117] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5115] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5117] <... open resumed>) = 4 [pid 5116] <... write resumed>) = 262144 [pid 5117] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5115] <... futex resumed>) = 0 [pid 5117] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5115] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5115] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5116] munmap(0x7f81b2d7d000, 262144 [pid 5117] <... mount resumed>) = 0 [pid 5117] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5115] <... futex resumed>) = 0 [pid 5117] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5115] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5117] <... open resumed>) = 5 [pid 5115] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5117] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5115] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5117] <... futex resumed>) = 0 [pid 5115] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5117] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5115] <... futex resumed>) = 0 [pid 5117] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5115] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5117] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5115] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5117] <... futex resumed>) = 0 [pid 5117] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5116] <... munmap resumed>) = 0 [pid 5116] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5116] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5116] close(3) = 0 [pid 5116] mkdir("./file1", 0777) = 0 [ 54.359113][ T5116] loop0: detected capacity change from 0 to 512 [ 54.378428][ T5116] EXT4-fs (loop0): 1 orphan inode deleted [ 54.384370][ T5116] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5116] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5116] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5116] chdir("./file1") = 0 [pid 5116] ioctl(6, LOOP_CLR_FD) = 0 [pid 5116] close(6) = 0 [pid 5116] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5116] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5115] exit_group(0 [pid 5116] <... futex resumed>) = ? [pid 5117] <... futex resumed>) = ? [pid 5115] <... exit_group resumed>) = ? [pid 5116] +++ exited with 0 +++ [pid 5117] +++ exited with 0 +++ [pid 5115] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5115, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./22", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./22/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./22/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/bus") = 0 umount2("./22/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/binderfs") = 0 umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./22/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./22/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./22") = 0 mkdir("./23", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5120 ./strace-static-x86_64: Process 5120 attached [pid 5120] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5120] chdir("./23") = 0 [pid 5120] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5120] setpgid(0, 0) = 0 [pid 5120] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5120] write(3, "1000", 4) = 4 [pid 5120] close(3) = 0 [pid 5120] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5120] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5120] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5120] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5120] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5120] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5120] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5120] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5121 attached [pid 5121] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5121] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5121] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [ 54.397394][ T5116] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/22/file1 supports timestamps until 2038-01-19 (0x7fffffff) [ 54.422994][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5121] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5120] <... clone3 resumed> => {parent_tid=[5121]}, 88) = 5121 [pid 5120] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5120] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5121] <... futex resumed>) = 0 [pid 5120] <... futex resumed>) = 1 [pid 5121] memfd_create("syzkaller", 0) = 3 [pid 5121] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5120] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5121] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5120] <... futex resumed>) = 0 [pid 5120] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81b2d7d000 [pid 5120] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5120] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5120] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0} => {parent_tid=[5122]}, 88) = 5122 ./strace-static-x86_64: Process 5122 attached [pid 5121] <... write resumed>) = 262144 [pid 5120] rt_sigprocmask(SIG_SETMASK, [], [pid 5122] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053 [pid 5121] munmap(0x7f81b2d9e000, 262144 [pid 5120] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5120] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5122] <... rseq resumed>) = 0 [pid 5122] set_robust_list(0x7f81b2d9d9a0, 24 [pid 5120] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5122] <... set_robust_list resumed>) = 0 [pid 5122] rt_sigprocmask(SIG_SETMASK, [], [pid 5121] <... munmap resumed>) = 0 [pid 5122] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5121] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5122] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 5 [pid 5122] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5121] <... openat resumed>) = 4 [pid 5122] <... futex resumed>) = 1 [pid 5121] ioctl(4, LOOP_SET_FD, 3 [pid 5120] <... futex resumed>) = 0 [pid 5120] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5122] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5120] <... futex resumed>) = 0 [pid 5121] <... ioctl resumed>) = 0 [pid 5122] <... mount resumed>) = 0 [pid 5121] close(3 [pid 5120] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5122] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5121] <... close resumed>) = 0 [pid 5120] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5122] <... futex resumed>) = 0 [pid 5121] mkdir("./file1", 0777 [pid 5120] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5120] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5121] <... mkdir resumed>) = 0 [pid 5122] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5121] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5122] <... open resumed>) = 3 [pid 5122] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5120] <... futex resumed>) = 0 [pid 5122] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5120] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5122] <... futex resumed>) = 0 [pid 5120] <... futex resumed>) = 1 [pid 5122] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5120] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5122] <... write resumed>) = 262144 [pid 5122] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5122] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5120] <... futex resumed>) = 0 [pid 5121] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5121] ioctl(4, LOOP_CLR_FD) = 0 [pid 5121] close(4) = 0 [pid 5121] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5121] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5120] exit_group(0 [pid 5122] <... futex resumed>) = ? [pid 5121] <... futex resumed>) = ? [pid 5120] <... exit_group resumed>) = ? [pid 5122] +++ exited with 0 +++ [pid 5121] +++ exited with 0 +++ [pid 5120] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5120, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./23", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./23/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./23/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/bus") = 0 umount2("./23/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/binderfs") = 0 umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./23/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./23") = 0 mkdir("./24", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5123 attached [pid 5123] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5123] chdir("./24") = 0 [pid 5123] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5123] setpgid(0, 0) = 0 [pid 5123] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5123 [pid 5123] write(3, "1000", 4) = 4 [pid 5123] close(3) = 0 [pid 5123] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5123] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5123] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5123] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5123] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5123] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5123] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [ 54.479400][ T5121] loop0: detected capacity change from 0 to 512 [ 54.494677][ T5121] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5123] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5124 attached => {parent_tid=[5124]}, 88) = 5124 [pid 5124] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5124] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5124] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5124] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5123] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5123] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5124] <... futex resumed>) = 0 [pid 5123] <... futex resumed>) = 1 [pid 5123] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5124] memfd_create("syzkaller", 0 [pid 5123] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5124] <... memfd_create resumed>) = 3 [pid 5123] <... mmap resumed>) = 0x7f81bb17d000 [pid 5124] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5123] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5123] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5123] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5125 attached [pid 5125] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5125] set_robust_list(0x7f81bb19d9a0, 24 [pid 5123] <... clone3 resumed> => {parent_tid=[5125]}, 88) = 5125 [pid 5125] <... set_robust_list resumed>) = 0 [pid 5123] rt_sigprocmask(SIG_SETMASK, [], [pid 5125] rt_sigprocmask(SIG_SETMASK, [], [pid 5123] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5125] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5125] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5123] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5123] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5124] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5125] <... open resumed>) = 4 [pid 5125] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5123] <... futex resumed>) = 0 [pid 5123] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5125] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5123] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5125] <... mount resumed>) = 0 [pid 5125] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5123] <... futex resumed>) = 0 [pid 5125] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5123] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5125] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5123] <... futex resumed>) = 0 [pid 5123] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5125] <... open resumed>) = 5 [pid 5125] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5125] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5123] <... futex resumed>) = 0 [pid 5123] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5125] <... futex resumed>) = 0 [pid 5123] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5125] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5125] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5123] <... futex resumed>) = 0 [pid 5125] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5124] <... write resumed>) = 262144 [pid 5124] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5124] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5124] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5124] close(3) = 0 [pid 5124] mkdir("./file1", 0777) = 0 [ 54.568750][ T5124] loop0: detected capacity change from 0 to 512 [ 54.587948][ T5124] EXT4-fs (loop0): 1 orphan inode deleted [ 54.593896][ T5124] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5124] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5124] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5124] chdir("./file1") = 0 [pid 5124] ioctl(6, LOOP_CLR_FD) = 0 [pid 5124] close(6) = 0 [pid 5124] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5123] exit_group(0 [pid 5125] <... futex resumed>) = ? [pid 5123] <... exit_group resumed>) = ? [pid 5125] +++ exited with 0 +++ [pid 5124] <... futex resumed>) = ? [pid 5124] +++ exited with 0 +++ [pid 5123] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5123, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./24", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./24/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./24/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/bus") = 0 umount2("./24/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/binderfs") = 0 umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./24/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./24") = 0 mkdir("./25", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5128 attached , child_tidptr=0x555556eda690) = 5128 [pid 5128] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5128] chdir("./25") = 0 [pid 5128] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5128] setpgid(0, 0) = 0 [pid 5128] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5128] write(3, "1000", 4) = 4 [pid 5128] close(3) = 0 [pid 5128] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5128] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5128] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5128] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5128] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5128] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5128] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5128] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5129]}, 88) = 5129 [pid 5128] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5128] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5128] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5128] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5128] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5128] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5128] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5130 attached => {parent_tid=[5130]}, 88) = 5130 [pid 5130] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5128] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5129 attached NULL, 8) = 0 [pid 5128] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5128] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5130] <... rseq resumed>) = 0 [pid 5130] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5130] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5130] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5129] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5129] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5129] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5130] <... open resumed>) = 3 [pid 5130] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5128] <... futex resumed>) = 0 [pid 5128] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5129] memfd_create("syzkaller", 0) = 4 [pid 5128] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5130] <... futex resumed>) = 1 [pid 5129] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5130] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5129] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5130] <... mount resumed>) = 0 [pid 5130] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5129] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5128] <... futex resumed>) = 0 [pid 5128] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5128] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5129] <... write resumed>) = 262144 [pid 5130] <... futex resumed>) = 1 [pid 5129] munmap(0x7f81b2d7d000, 262144 [pid 5130] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5129] <... munmap resumed>) = 0 [pid 5129] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5130] <... open resumed>) = 5 [pid 5130] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5128] <... futex resumed>) = 0 [pid 5130] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5128] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5129] <... openat resumed>) = 6 [pid 5130] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5128] <... futex resumed>) = 0 [ 54.607062][ T5124] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/24/file1 supports timestamps until 2038-01-19 (0x7fffffff) [ 54.638731][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5130] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5129] ioctl(6, LOOP_SET_FD, 4 [pid 5128] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5130] <... futex resumed>) = 0 [pid 5128] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5130] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5129] <... ioctl resumed>) = 0 [pid 5129] close(4) = 0 [pid 5129] mkdir("./file1", 0777) = 0 [ 54.678077][ T5129] loop0: detected capacity change from 0 to 512 [ 54.697983][ T5129] EXT4-fs (loop0): 1 orphan inode deleted [ 54.703944][ T5129] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5129] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5129] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5129] chdir("./file1") = 0 [pid 5129] ioctl(6, LOOP_CLR_FD) = 0 [pid 5129] close(6) = 0 [pid 5129] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5129] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5128] exit_group(0 [pid 5130] <... futex resumed>) = ? [pid 5128] <... exit_group resumed>) = ? [pid 5130] +++ exited with 0 +++ [pid 5129] <... futex resumed>) = ? [pid 5129] +++ exited with 0 +++ [pid 5128] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5128, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./25", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./25/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./25/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/bus") = 0 umount2("./25/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/binderfs") = 0 [ 54.716891][ T5129] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/25/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./25/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./25") = 0 mkdir("./26", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5133 ./strace-static-x86_64: Process 5133 attached [pid 5133] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5133] chdir("./26") = 0 [pid 5133] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5133] setpgid(0, 0) = 0 [pid 5133] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5133] write(3, "1000", 4) = 4 [pid 5133] close(3) = 0 [pid 5133] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5133] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5133] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5133] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5133] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5133] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5133] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5133] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5134 attached => {parent_tid=[5134]}, 88) = 5134 [pid 5134] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5133] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5133] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5133] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5133] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5134] <... rseq resumed>) = 0 [pid 5133] <... mmap resumed>) = 0x7f81bb17d000 [pid 5133] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5134] set_robust_list(0x7f81bb1be9a0, 24 [pid 5133] <... mprotect resumed>) = 0 [pid 5133] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5134] <... set_robust_list resumed>) = 0 [pid 5134] rt_sigprocmask(SIG_SETMASK, [], [pid 5133] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5135 attached [pid 5134] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5133] <... clone3 resumed> => {parent_tid=[5135]}, 88) = 5135 [pid 5133] rt_sigprocmask(SIG_SETMASK, [], [pid 5135] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5134] memfd_create("syzkaller", 0 [pid 5133] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5135] <... rseq resumed>) = 0 [pid 5135] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5135] rt_sigprocmask(SIG_SETMASK, [], [pid 5133] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5135] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5134] <... memfd_create resumed>) = 3 [pid 5135] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5133] <... futex resumed>) = 0 [pid 5135] <... open resumed>) = 4 [pid 5134] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5133] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5135] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5134] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5133] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5135] <... futex resumed>) = 0 [pid 5135] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5133] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5133] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5135] <... futex resumed>) = 0 [pid 5135] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5134] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5135] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5133] <... futex resumed>) = 0 [pid 5135] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5133] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5135] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5133] <... futex resumed>) = 0 [pid 5135] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5133] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5134] <... write resumed>) = 262144 [pid 5134] munmap(0x7f81b2d7d000, 262144 [pid 5135] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5133] <... futex resumed>) = 0 [pid 5135] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5134] <... munmap resumed>) = 0 [pid 5133] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5135] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5135] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5134] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5135] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5135] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5134] <... openat resumed>) = 6 [pid 5133] <... futex resumed>) = 0 [pid 5135] <... futex resumed>) = 0 [pid 5134] ioctl(6, LOOP_SET_FD, 3 [pid 5133] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5135] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5133] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 54.762975][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5134] <... ioctl resumed>) = 0 [pid 5134] close(3) = 0 [pid 5134] mkdir("./file1", 0777) = 0 [pid 5134] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5134] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5134] chdir("./file1") = 0 [pid 5134] ioctl(6, LOOP_CLR_FD) = 0 [pid 5134] close(6) = 0 [pid 5134] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5134] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5133] exit_group(0) = ? [pid 5134] <... futex resumed>) = ? [pid 5134] +++ exited with 0 +++ [pid 5135] <... futex resumed>) = ? [pid 5135] +++ exited with 0 +++ [pid 5133] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5133, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./26", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./26/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./26/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/bus") = 0 umount2("./26/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/binderfs") = 0 [ 54.819875][ T5134] loop0: detected capacity change from 0 to 512 [ 54.838299][ T5134] EXT4-fs (loop0): 1 orphan inode deleted [ 54.844034][ T5134] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 54.856724][ T5134] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/26/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./26/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./26") = 0 mkdir("./27", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5138 attached , child_tidptr=0x555556eda690) = 5138 [pid 5138] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5138] chdir("./27") = 0 [pid 5138] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5138] setpgid(0, 0) = 0 [pid 5138] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5138] write(3, "1000", 4) = 4 [pid 5138] close(3) = 0 [pid 5138] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5138] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5138] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5138] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5138] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5138] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5138] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5138] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5139 attached [pid 5139] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5138] <... clone3 resumed> => {parent_tid=[5139]}, 88) = 5139 [pid 5139] <... rseq resumed>) = 0 [pid 5138] rt_sigprocmask(SIG_SETMASK, [], [pid 5139] set_robust_list(0x7f81bb1be9a0, 24 [pid 5138] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5139] <... set_robust_list resumed>) = 0 [pid 5138] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5139] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5138] <... futex resumed>) = 0 [pid 5139] memfd_create("syzkaller", 0 [pid 5138] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5138] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5139] <... memfd_create resumed>) = 3 [pid 5138] <... mmap resumed>) = 0x7f81bb17d000 [pid 5139] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5138] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5139] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5138] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5138] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5140]}, 88) = 5140 [pid 5138] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5138] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5138] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5140 attached [pid 5140] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5140] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5140] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5139] <... write resumed>) = 262144 [pid 5139] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5139] openat(AT_FDCWD, "/dev/loop0", O_RDWR [ 54.898922][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5140] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5139] <... openat resumed>) = 4 [pid 5139] ioctl(4, LOOP_SET_FD, 3 [pid 5140] <... open resumed>) = 5 [pid 5140] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5140] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5139] <... ioctl resumed>) = 0 [pid 5138] <... futex resumed>) = 0 [pid 5139] close(3) = 0 [pid 5139] mkdir("./file1", 0777 [pid 5138] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5139] <... mkdir resumed>) = 0 [pid 5138] <... futex resumed>) = 1 [pid 5140] <... futex resumed>) = 0 [pid 5139] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5140] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5140] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5140] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5138] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5138] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5140] <... futex resumed>) = 0 [pid 5138] <... futex resumed>) = 1 [pid 5140] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5138] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5140] <... open resumed>) = 3 [pid 5140] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5138] <... futex resumed>) = 0 [pid 5140] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5138] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5140] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5138] <... futex resumed>) = 0 [pid 5140] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5138] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5140] <... write resumed>) = 262144 [pid 5140] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5138] <... futex resumed>) = 0 [pid 5140] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5139] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5139] ioctl(4, LOOP_CLR_FD) = 0 [pid 5139] close(4) = 0 [pid 5139] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5139] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5138] exit_group(0 [pid 5140] <... futex resumed>) = ? [pid 5138] <... exit_group resumed>) = ? [pid 5140] +++ exited with 0 +++ [pid 5139] <... futex resumed>) = ? [pid 5139] +++ exited with 0 +++ [pid 5138] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5138, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./27", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./27/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./27/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/bus") = 0 umount2("./27/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/binderfs") = 0 umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./27/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./27") = 0 mkdir("./28", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5141 ./strace-static-x86_64: Process 5141 attached [pid 5141] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5141] chdir("./28") = 0 [pid 5141] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5141] setpgid(0, 0) = 0 [pid 5141] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5141] write(3, "1000", 4) = 4 [pid 5141] close(3) = 0 [pid 5141] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5141] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5141] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5141] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5141] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [ 54.947890][ T5139] loop0: detected capacity change from 0 to 512 [ 54.975248][ T5139] EXT4-fs warning (device loop0): read_mmp_block:115: Error -117 while reading MMP block 8 [pid 5141] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5141] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5141] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5142 attached => {parent_tid=[5142]}, 88) = 5142 [pid 5142] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5141] rt_sigprocmask(SIG_SETMASK, [], [pid 5142] <... rseq resumed>) = 0 [pid 5141] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5142] set_robust_list(0x7f81bb1be9a0, 24 [pid 5141] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5142] <... set_robust_list resumed>) = 0 [pid 5141] <... futex resumed>) = 0 [pid 5142] rt_sigprocmask(SIG_SETMASK, [], [pid 5141] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5142] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5141] <... futex resumed>) = 0 [pid 5142] memfd_create("syzkaller", 0 [pid 5141] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5142] <... memfd_create resumed>) = 3 [pid 5141] <... mmap resumed>) = 0x7f81bb17d000 [pid 5142] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5141] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5142] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5141] <... mprotect resumed>) = 0 [pid 5141] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5141] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5142] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5141] <... clone3 resumed> => {parent_tid=[5143]}, 88) = 5143 [pid 5141] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5143 attached [pid 5142] munmap(0x7f81b2d7d000, 262144 [pid 5143] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5141] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5142] <... munmap resumed>) = 0 [pid 5143] <... rseq resumed>) = 0 [pid 5141] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5143] set_robust_list(0x7f81bb19d9a0, 24 [pid 5141] <... futex resumed>) = 0 [pid 5143] <... set_robust_list resumed>) = 0 [pid 5142] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5143] rt_sigprocmask(SIG_SETMASK, [], [pid 5141] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5143] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5143] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 5 [pid 5143] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5142] <... openat resumed>) = 4 [pid 5142] ioctl(4, LOOP_SET_FD, 3 [pid 5143] <... futex resumed>) = 1 [pid 5143] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5141] <... futex resumed>) = 0 [pid 5141] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5141] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5143] <... futex resumed>) = 0 [pid 5143] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5143] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5141] <... futex resumed>) = 0 [pid 5143] <... futex resumed>) = 1 [pid 5143] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5141] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5143] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5141] <... futex resumed>) = 0 [pid 5142] <... ioctl resumed>) = 0 [pid 5143] <... open resumed>) = 6 [pid 5141] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5142] close(3) = 0 [pid 5143] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5142] mkdir("./file1", 0777 [pid 5143] <... futex resumed>) = 1 [pid 5143] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5141] <... futex resumed>) = 0 [pid 5142] <... mkdir resumed>) = 0 [pid 5142] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5141] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5141] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5143] <... futex resumed>) = 0 [pid 5143] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 262144 [pid 5143] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5141] <... futex resumed>) = 0 [pid 5143] <... futex resumed>) = 1 [ 55.038836][ T5142] loop0: detected capacity change from 0 to 512 [ 55.055959][ T5144] EXT4-fs warning (device loop0): kmmpd:168: kmmpd being stopped since MMP feature has been disabled. [ 55.056479][ T5142] EXT4-fs error (device loop0): __ext4_get_inode_loc:4379: comm syz-executor212: Invalid inode table block 0 in block_group 0 [ 55.080493][ T5142] EXT4-fs (loop0): get root inode failed [pid 5143] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5142] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5142] ioctl(4, LOOP_CLR_FD) = 0 [pid 5142] close(4) = 0 [pid 5142] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5142] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5141] exit_group(0) = ? [pid 5143] <... futex resumed>) = ? [pid 5142] <... futex resumed>) = ? [pid 5143] +++ exited with 0 +++ [pid 5142] +++ exited with 0 +++ [pid 5141] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5141, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./28", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./28/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./28/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/bus") = 0 umount2("./28/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/binderfs") = 0 umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./28/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./28") = 0 mkdir("./29", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5146 ./strace-static-x86_64: Process 5146 attached [pid 5146] set_robust_list(0x555556eda6a0, 24) = 0 [ 55.086175][ T5142] EXT4-fs (loop0): mount failed [pid 5146] chdir("./29") = 0 [pid 5146] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5146] setpgid(0, 0) = 0 [pid 5146] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5146] write(3, "1000", 4) = 4 [pid 5146] close(3) = 0 [pid 5146] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5146] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5146] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5146] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5146] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5146] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5146] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5146] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5147 attached => {parent_tid=[5147]}, 88) = 5147 [pid 5147] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5146] rt_sigprocmask(SIG_SETMASK, [], [pid 5147] <... rseq resumed>) = 0 [pid 5147] set_robust_list(0x7f81bb1be9a0, 24 [pid 5146] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5147] <... set_robust_list resumed>) = 0 [pid 5146] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5147] rt_sigprocmask(SIG_SETMASK, [], [pid 5146] <... futex resumed>) = 0 [pid 5147] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5147] memfd_create("syzkaller", 0 [pid 5146] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5147] <... memfd_create resumed>) = 3 [pid 5146] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5147] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5146] <... mmap resumed>) = 0x7f81bb17d000 [pid 5147] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5146] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5146] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5146] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5147] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5146] <... clone3 resumed> => {parent_tid=[5148]}, 88) = 5148 ./strace-static-x86_64: Process 5148 attached [pid 5146] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5148] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5146] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5148] <... rseq resumed>) = 0 [pid 5146] <... futex resumed>) = 0 [pid 5148] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5148] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5148] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5146] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5148] <... open resumed>) = 4 [pid 5147] <... write resumed>) = 262144 [pid 5148] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5147] munmap(0x7f81b2d7d000, 262144 [pid 5146] <... futex resumed>) = 0 [pid 5148] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5147] <... munmap resumed>) = 0 [pid 5146] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5148] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5148] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5146] <... futex resumed>) = 0 [pid 5146] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5147] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5148] <... mount resumed>) = 0 [pid 5147] <... openat resumed>) = 5 [pid 5148] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5146] <... futex resumed>) = 0 [pid 5148] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5146] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5148] <... futex resumed>) = 0 [pid 5146] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5147] ioctl(5, LOOP_SET_FD, 3 [pid 5148] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5148] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5148] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5146] <... futex resumed>) = 0 [pid 5147] <... ioctl resumed>) = 0 [pid 5146] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5148] <... futex resumed>) = 0 [pid 5147] close(3 [pid 5146] <... futex resumed>) = 1 [pid 5147] <... close resumed>) = 0 [pid 5146] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5147] mkdir("./file1", 0777 [pid 5148] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5147] <... mkdir resumed>) = 0 [pid 5147] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5148] <... write resumed>) = 262144 [pid 5148] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5146] <... futex resumed>) = 0 [pid 5148] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5147] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5147] ioctl(5, LOOP_CLR_FD) = 0 [pid 5147] close(5) = 0 [pid 5147] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5146] exit_group(0 [pid 5148] <... futex resumed>) = ? [pid 5146] <... exit_group resumed>) = ? [pid 5148] +++ exited with 0 +++ [pid 5147] <... futex resumed>) = ? [pid 5147] +++ exited with 0 +++ [pid 5146] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5146, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./29", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./29/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./29/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/bus") = 0 umount2("./29/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/binderfs") = 0 umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./29/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./29") = 0 mkdir("./30", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5149 ./strace-static-x86_64: Process 5149 attached [pid 5149] set_robust_list(0x555556eda6a0, 24) = 0 [ 55.151595][ T5147] loop0: detected capacity change from 0 to 512 [ 55.166526][ T5147] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5149] chdir("./30") = 0 [pid 5149] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5149] setpgid(0, 0) = 0 [pid 5149] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5149] write(3, "1000", 4) = 4 [pid 5149] close(3) = 0 [pid 5149] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5149] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5149] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5149] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5149] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5149] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5149] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5149] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5150 attached => {parent_tid=[5150]}, 88) = 5150 [pid 5149] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5150] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5149] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5149] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5150] <... rseq resumed>) = 0 [pid 5149] <... futex resumed>) = 0 [pid 5149] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5149] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5150] set_robust_list(0x7f81bb1be9a0, 24 [pid 5149] <... mprotect resumed>) = 0 [pid 5149] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5150] <... set_robust_list resumed>) = 0 [pid 5149] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5149] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5151 attached [pid 5151] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5149] <... clone3 resumed> => {parent_tid=[5151]}, 88) = 5151 [pid 5151] set_robust_list(0x7f81bb19d9a0, 24 [pid 5150] rt_sigprocmask(SIG_SETMASK, [], [pid 5151] <... set_robust_list resumed>) = 0 [pid 5150] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5149] rt_sigprocmask(SIG_SETMASK, [], [pid 5151] rt_sigprocmask(SIG_SETMASK, [], [pid 5149] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5151] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5150] memfd_create("syzkaller", 0 [pid 5149] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5151] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5149] <... futex resumed>) = 0 [pid 5150] <... memfd_create resumed>) = 3 [pid 5149] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5151] <... open resumed>) = 4 [pid 5150] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5151] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5150] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5149] <... futex resumed>) = 0 [pid 5149] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5149] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5151] <... futex resumed>) = 1 [pid 5151] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5151] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5149] <... futex resumed>) = 0 [pid 5149] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5151] <... futex resumed>) = 1 [pid 5149] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5151] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5151] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5149] <... futex resumed>) = 0 [pid 5150] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5149] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5151] <... futex resumed>) = 1 [pid 5149] <... futex resumed>) = 0 [pid 5151] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5149] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5151] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5151] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5151] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5149] <... futex resumed>) = 0 [pid 5150] <... write resumed>) = 262144 [pid 5150] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5150] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5150] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5150] close(3) = 0 [pid 5150] mkdir("./file1", 0777) = 0 [pid 5150] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5150] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5150] chdir("./file1") = 0 [pid 5150] ioctl(6, LOOP_CLR_FD) = 0 [pid 5150] close(6) = 0 [pid 5150] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5149] exit_group(0 [pid 5151] <... futex resumed>) = ? [pid 5150] <... futex resumed>) = ? [pid 5151] +++ exited with 0 +++ [pid 5150] +++ exited with 0 +++ [pid 5149] <... exit_group resumed>) = ? [pid 5149] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5149, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./30", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./30/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./30/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/bus") = 0 umount2("./30/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/binderfs") = 0 [ 55.233164][ T5150] loop0: detected capacity change from 0 to 512 [ 55.247858][ T5150] EXT4-fs (loop0): 1 orphan inode deleted [ 55.253769][ T5150] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 55.266457][ T5150] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/30/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./30/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./30") = 0 mkdir("./31", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5154 attached , child_tidptr=0x555556eda690) = 5154 [pid 5154] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5154] chdir("./31") = 0 [pid 5154] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5154] setpgid(0, 0) = 0 [pid 5154] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5154] write(3, "1000", 4) = 4 [pid 5154] close(3) = 0 [pid 5154] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5154] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5154] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5154] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5154] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5154] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5154] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5154] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5155 attached => {parent_tid=[5155]}, 88) = 5155 [pid 5154] rt_sigprocmask(SIG_SETMASK, [], [pid 5155] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5154] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5155] <... rseq resumed>) = 0 [pid 5154] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5155] set_robust_list(0x7f81bb1be9a0, 24 [pid 5154] <... futex resumed>) = 0 [pid 5155] <... set_robust_list resumed>) = 0 [pid 5154] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5155] rt_sigprocmask(SIG_SETMASK, [], [pid 5154] <... futex resumed>) = 0 [pid 5155] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5154] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5155] memfd_create("syzkaller", 0 [pid 5154] <... mmap resumed>) = 0x7f81bb17d000 [pid 5155] <... memfd_create resumed>) = 3 [pid 5154] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5155] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5154] <... mprotect resumed>) = 0 [pid 5155] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5154] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5154] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5156]}, 88) = 5156 ./strace-static-x86_64: Process 5156 attached [pid 5155] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5154] rt_sigprocmask(SIG_SETMASK, [], [pid 5156] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5154] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5156] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5154] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5156] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5154] <... futex resumed>) = 0 [pid 5156] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5154] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5156] <... open resumed>) = 4 [pid 5156] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5154] <... futex resumed>) = 0 [pid 5154] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5155] <... write resumed>) = 262144 [pid 5154] <... futex resumed>) = 0 [pid 5155] munmap(0x7f81b2d7d000, 262144 [pid 5154] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5156] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5155] <... munmap resumed>) = 0 [pid 5155] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5156] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5155] <... openat resumed>) = 5 [pid 5155] ioctl(5, LOOP_SET_FD, 3 [pid 5156] <... futex resumed>) = 1 [pid 5154] <... futex resumed>) = 0 [ 55.295865][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5156] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5154] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5154] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5156] <... futex resumed>) = 0 [pid 5156] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5155] <... ioctl resumed>) = 0 [pid 5155] close(3) = 0 [pid 5156] <... open resumed>) = 6 [pid 5156] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5155] mkdir("./file1", 0777 [pid 5156] <... futex resumed>) = 1 [pid 5154] <... futex resumed>) = 0 [pid 5156] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5154] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5156] <... futex resumed>) = 0 [pid 5154] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5156] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5155] <... mkdir resumed>) = 0 [pid 5155] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5156] <... write resumed>) = 262144 [pid 5156] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5154] <... futex resumed>) = 0 [pid 5156] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5155] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5155] ioctl(5, LOOP_CLR_FD) = 0 [pid 5155] close(5) = 0 [pid 5155] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5155] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5154] exit_group(0) = ? [pid 5156] <... futex resumed>) = ? [pid 5156] +++ exited with 0 +++ [pid 5155] <... futex resumed>) = ? [pid 5155] +++ exited with 0 +++ [pid 5154] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5154, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./31", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./31/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./31/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/bus") = 0 umount2("./31/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/binderfs") = 0 umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./31/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./31") = 0 mkdir("./32", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5157 attached , child_tidptr=0x555556eda690) = 5157 [pid 5157] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5157] chdir("./32") = 0 [pid 5157] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5157] setpgid(0, 0) = 0 [pid 5157] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5157] write(3, "1000", 4) = 4 [ 55.340262][ T5155] loop0: detected capacity change from 0 to 512 [ 55.354658][ T5155] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5157] close(3) = 0 [pid 5157] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5157] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5157] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5157] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5157] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5157] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5157] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5157] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5158 attached => {parent_tid=[5158]}, 88) = 5158 [pid 5157] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5157] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5157] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5157] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5158] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5157] <... mmap resumed>) = 0x7f81bb17d000 [pid 5157] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5158] <... rseq resumed>) = 0 [pid 5157] <... mprotect resumed>) = 0 [pid 5158] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5158] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5157] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5157] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5159 attached [pid 5158] memfd_create("syzkaller", 0 [pid 5157] <... clone3 resumed> => {parent_tid=[5159]}, 88) = 5159 [pid 5157] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5157] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5157] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5158] <... memfd_create resumed>) = 3 [pid 5159] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5159] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5159] rt_sigprocmask(SIG_SETMASK, [], [pid 5158] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5159] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5158] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5159] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5159] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5157] <... futex resumed>) = 0 [pid 5159] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5158] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5157] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5157] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5159] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5159] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5158] <... write resumed>) = 262144 [pid 5158] munmap(0x7f81b2d7d000, 262144 [pid 5159] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5157] <... futex resumed>) = 0 [pid 5157] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5157] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5159] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5158] <... munmap resumed>) = 0 [pid 5159] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5157] <... futex resumed>) = 0 [pid 5159] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5157] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5158] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5159] <... futex resumed>) = 0 [pid 5157] <... futex resumed>) = 1 [pid 5159] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5158] <... openat resumed>) = 6 [pid 5157] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5159] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5159] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5158] ioctl(6, LOOP_SET_FD, 3 [pid 5157] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5159] <... futex resumed>) = 0 [pid 5159] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5158] <... ioctl resumed>) = 0 [pid 5158] close(3) = 0 [pid 5158] mkdir("./file1", 0777) = 0 [pid 5158] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5158] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5158] chdir("./file1") = 0 [pid 5158] ioctl(6, LOOP_CLR_FD) = 0 [pid 5158] close(6) = 0 [pid 5158] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5158] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5157] exit_group(0 [pid 5158] <... futex resumed>) = ? [pid 5157] <... exit_group resumed>) = ? [pid 5159] <... futex resumed>) = ? [pid 5159] +++ exited with 0 +++ [pid 5158] +++ exited with 0 +++ [pid 5157] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5157, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./32", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./32/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./32/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/bus") = 0 umount2("./32/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/binderfs") = 0 [ 55.419978][ T5158] loop0: detected capacity change from 0 to 512 [ 55.438581][ T5158] EXT4-fs (loop0): 1 orphan inode deleted [ 55.444531][ T5158] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 55.457657][ T5158] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/32/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./32/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./32") = 0 mkdir("./33", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5162 attached , child_tidptr=0x555556eda690) = 5162 [pid 5162] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5162] chdir("./33") = 0 [pid 5162] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5162] setpgid(0, 0) = 0 [pid 5162] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5162] write(3, "1000", 4) = 4 [pid 5162] close(3) = 0 [pid 5162] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5162] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5162] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5162] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5162] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5162] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5162] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5162] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5163 attached => {parent_tid=[5163]}, 88) = 5163 [pid 5163] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5163] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5162] rt_sigprocmask(SIG_SETMASK, [], [pid 5163] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5162] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5163] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5162] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5163] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5162] <... futex resumed>) = 0 [pid 5163] memfd_create("syzkaller", 0 [pid 5162] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5163] <... memfd_create resumed>) = 3 [pid 5163] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5162] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5163] <... mmap resumed>) = 0x7f81b2d9e000 [pid 5162] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5162] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5162] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5162] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0} => {parent_tid=[5164]}, 88) = 5164 [pid 5162] rt_sigprocmask(SIG_SETMASK, [], [pid 5163] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5162] <... rt_sigprocmask resumed>NULL, 8) = 0 ./strace-static-x86_64: Process 5164 attached [pid 5164] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053 [pid 5162] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5164] <... rseq resumed>) = 0 [pid 5162] <... futex resumed>) = 0 [pid 5164] set_robust_list(0x7f81b2d9d9a0, 24) = 0 [pid 5162] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5164] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5164] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5163] <... write resumed>) = 262144 [pid 5163] munmap(0x7f81b2d9e000, 262144 [pid 5164] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5163] <... munmap resumed>) = 0 [pid 5163] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5164] <... futex resumed>) = 1 [pid 5163] <... openat resumed>) = 5 [pid 5162] <... futex resumed>) = 0 [pid 5164] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [ 55.489856][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5163] ioctl(5, LOOP_SET_FD, 3) = 0 [pid 5162] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5162] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5164] <... futex resumed>) = 0 [pid 5164] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5164] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5162] <... futex resumed>) = 0 [pid 5164] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5162] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5162] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5164] <... open resumed>) = 6 [pid 5164] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5162] <... futex resumed>) = 0 [pid 5164] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5162] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5162] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5163] close(3) = 0 [pid 5163] mkdir("./file1", 0777) = 0 [pid 5163] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5164] <... write resumed>) = 262144 [pid 5164] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5162] <... futex resumed>) = 0 [pid 5164] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5163] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5163] ioctl(5, LOOP_CLR_FD) = 0 [pid 5163] close(5) = 0 [pid 5163] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5163] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5162] exit_group(0 [pid 5163] <... futex resumed>) = ? [pid 5162] <... exit_group resumed>) = ? [pid 5164] <... futex resumed>) = ? [pid 5164] +++ exited with 0 +++ [pid 5163] +++ exited with 0 +++ [pid 5162] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5162, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./33", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./33/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./33/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/bus") = 0 umount2("./33/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/binderfs") = 0 umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./33/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./33") = 0 mkdir("./34", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5165 attached , child_tidptr=0x555556eda690) = 5165 [pid 5165] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5165] chdir("./34") = 0 [pid 5165] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5165] setpgid(0, 0) = 0 [pid 5165] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5165] write(3, "1000", 4) = 4 [pid 5165] close(3) = 0 [pid 5165] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5165] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5165] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5165] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5165] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5165] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5165] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5165] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5166 attached [pid 5166] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5166] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5166] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5166] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5165] <... clone3 resumed> => {parent_tid=[5166]}, 88) = 5166 [pid 5165] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5165] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5166] <... futex resumed>) = 0 [pid 5166] memfd_create("syzkaller", 0 [pid 5165] <... futex resumed>) = 1 [ 55.535313][ T5163] loop0: detected capacity change from 0 to 512 [ 55.552081][ T5163] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5165] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5166] <... memfd_create resumed>) = 3 [pid 5165] <... futex resumed>) = 0 [pid 5165] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5166] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5165] <... mmap resumed>) = 0x7f81bb17d000 [pid 5166] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5165] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5165] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5165] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5167]}, 88) = 5167 [pid 5165] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5165] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5166] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5165] <... futex resumed>) = 0 [pid 5165] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5167 attached [pid 5167] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5166] <... write resumed>) = 262144 [pid 5167] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5166] munmap(0x7f81b2d7d000, 262144 [pid 5167] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5167] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5166] <... munmap resumed>) = 0 [pid 5166] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5167] <... open resumed>) = 4 [pid 5166] <... openat resumed>) = 5 [pid 5166] ioctl(5, LOOP_SET_FD, 3 [pid 5167] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5166] <... ioctl resumed>) = 0 [pid 5166] close(3) = 0 [pid 5166] mkdir("./file1", 0777 [pid 5167] <... futex resumed>) = 1 [pid 5165] <... futex resumed>) = 0 [pid 5165] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5165] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5166] <... mkdir resumed>) = 0 [pid 5166] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5167] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5167] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5165] <... futex resumed>) = 0 [pid 5167] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5165] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5165] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5167] <... open resumed>) = 3 [pid 5167] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5165] <... futex resumed>) = 0 [pid 5167] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5165] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5167] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5165] <... futex resumed>) = 0 [pid 5167] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5165] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5167] <... write resumed>) = 262144 [pid 5167] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5167] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5165] <... futex resumed>) = 0 [ 55.600752][ T5166] loop0: detected capacity change from 0 to 512 [ 55.615632][ T5168] EXT4-fs warning (device loop0): kmmpd:168: kmmpd being stopped since MMP feature has been disabled. [ 55.622510][ T5166] EXT4-fs error (device loop0): __ext4_get_inode_loc:4379: comm syz-executor212: Invalid inode table block 0 in block_group 0 [ 55.640739][ T5166] EXT4-fs (loop0): get root inode failed [pid 5166] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5166] ioctl(5, LOOP_CLR_FD) = 0 [pid 5166] close(5) = 0 [pid 5166] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5166] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5165] exit_group(0 [pid 5167] <... futex resumed>) = ? [pid 5166] <... futex resumed>) = ? [pid 5165] <... exit_group resumed>) = ? [pid 5167] +++ exited with 0 +++ [pid 5166] +++ exited with 0 +++ [pid 5165] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5165, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./34", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./34/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./34/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/bus") = 0 umount2("./34/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/binderfs") = 0 umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./34/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./34") = 0 mkdir("./35", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5170 attached , child_tidptr=0x555556eda690) = 5170 [pid 5170] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5170] chdir("./35") = 0 [pid 5170] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5170] setpgid(0, 0) = 0 [pid 5170] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5170] write(3, "1000", 4) = 4 [pid 5170] close(3) = 0 [pid 5170] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5170] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5170] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5170] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5170] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5170] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5170] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5170] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5171 attached => {parent_tid=[5171]}, 88) = 5171 [ 55.646745][ T5166] EXT4-fs (loop0): mount failed [pid 5171] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5170] rt_sigprocmask(SIG_SETMASK, [], [pid 5171] <... rseq resumed>) = 0 [pid 5171] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5171] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5171] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5170] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5170] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5170] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5171] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5170] <... futex resumed>) = 0 [pid 5170] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5170] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5171] memfd_create("syzkaller", 0 [pid 5170] <... mprotect resumed>) = 0 [pid 5170] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5171] <... memfd_create resumed>) = 3 [pid 5171] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5170] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5171] <... mmap resumed>) = 0x7f81b2d7d000 ./strace-static-x86_64: Process 5172 attached [pid 5170] <... clone3 resumed> => {parent_tid=[5172]}, 88) = 5172 [pid 5172] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5170] rt_sigprocmask(SIG_SETMASK, [], [pid 5172] set_robust_list(0x7f81bb19d9a0, 24 [pid 5170] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5172] <... set_robust_list resumed>) = 0 [pid 5170] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5172] rt_sigprocmask(SIG_SETMASK, [], [pid 5170] <... futex resumed>) = 0 [pid 5172] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5170] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5172] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5171] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5172] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5170] <... futex resumed>) = 0 [pid 5170] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5172] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5170] <... futex resumed>) = 0 [pid 5172] <... mount resumed>) = 0 [pid 5170] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5172] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5170] <... futex resumed>) = 0 [pid 5170] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5172] <... futex resumed>) = 1 [pid 5170] <... futex resumed>) = 0 [pid 5172] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5170] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5172] <... open resumed>) = 5 [pid 5172] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5170] <... futex resumed>) = 0 [pid 5170] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5172] <... futex resumed>) = 1 [pid 5170] <... futex resumed>) = 0 [pid 5172] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5170] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5172] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5172] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5170] <... futex resumed>) = 0 [pid 5172] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5171] <... write resumed>) = 262144 [pid 5171] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5171] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5171] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5171] close(3) = 0 [pid 5171] mkdir("./file1", 0777) = 0 [pid 5171] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5171] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5171] chdir("./file1") = 0 [pid 5171] ioctl(6, LOOP_CLR_FD) = 0 [pid 5171] close(6) = 0 [pid 5171] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5170] exit_group(0 [pid 5171] ???( [pid 5170] <... exit_group resumed>) = ? [pid 5171] <... ??? resumed>) = ? [pid 5172] <... futex resumed>) = ? [pid 5171] +++ exited with 0 +++ [pid 5172] +++ exited with 0 +++ [pid 5170] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5170, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./35", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./35/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./35/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/bus") = 0 umount2("./35/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/binderfs") = 0 [ 55.721368][ T5171] loop0: detected capacity change from 0 to 512 [ 55.738046][ T5171] EXT4-fs (loop0): 1 orphan inode deleted [ 55.743828][ T5171] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 55.757007][ T5171] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/35/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./35/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./35") = 0 mkdir("./36", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5176 attached , child_tidptr=0x555556eda690) = 5176 [pid 5176] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5176] chdir("./36") = 0 [pid 5176] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5176] setpgid(0, 0) = 0 [pid 5176] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5176] write(3, "1000", 4) = 4 [pid 5176] close(3) = 0 [pid 5176] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5176] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5176] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5176] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5176] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5176] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5176] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5176] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5177 attached [pid 5177] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5176] <... clone3 resumed> => {parent_tid=[5177]}, 88) = 5177 [pid 5177] <... rseq resumed>) = 0 [pid 5176] rt_sigprocmask(SIG_SETMASK, [], [pid 5177] set_robust_list(0x7f81bb1be9a0, 24 [pid 5176] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5177] <... set_robust_list resumed>) = 0 [pid 5176] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5177] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5176] <... futex resumed>) = 0 [pid 5177] memfd_create("syzkaller", 0 [pid 5176] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5176] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5177] <... memfd_create resumed>) = 3 [pid 5176] <... mmap resumed>) = 0x7f81bb17d000 [pid 5177] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5176] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5177] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5176] <... mprotect resumed>) = 0 [pid 5176] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5176] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5178]}, 88) = 5178 [pid 5176] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5176] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5178 attached ) = 0 [pid 5178] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5176] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5178] <... rseq resumed>) = 0 [pid 5178] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5178] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5178] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5177] <... write resumed>) = 262144 [pid 5178] <... open resumed>) = 4 [pid 5177] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5178] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5178] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5176] <... futex resumed>) = 0 [pid 5176] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5178] <... futex resumed>) = 0 [pid 5178] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5176] <... futex resumed>) = 1 [pid 5176] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5178] <... mount resumed>) = 0 [pid 5177] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5178] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5177] <... openat resumed>) = 5 [pid 5178] <... futex resumed>) = 1 [pid 5176] <... futex resumed>) = 0 [pid 5176] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [ 55.783001][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5178] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5176] <... futex resumed>) = 0 [pid 5178] <... open resumed>) = 6 [pid 5176] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5177] ioctl(5, LOOP_SET_FD, 3 [pid 5178] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5178] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5176] <... futex resumed>) = 0 [pid 5176] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5178] <... futex resumed>) = 0 [pid 5176] <... futex resumed>) = 1 [pid 5178] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5177] <... ioctl resumed>) = 0 [pid 5176] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5177] close(3) = 0 [pid 5177] mkdir("./file1", 0777) = 0 [pid 5177] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5178] <... write resumed>) = 262144 [pid 5178] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5176] <... futex resumed>) = 0 [pid 5178] <... futex resumed>) = 1 [pid 5178] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5177] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5177] ioctl(5, LOOP_CLR_FD) = 0 [pid 5177] close(5) = 0 [pid 5177] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5177] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5176] exit_group(0 [pid 5178] <... futex resumed>) = ? [pid 5177] <... futex resumed>) = ? [pid 5176] <... exit_group resumed>) = ? [pid 5178] +++ exited with 0 +++ [pid 5177] +++ exited with 0 +++ [pid 5176] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5176, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./36", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./36/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./36/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/bus") = 0 umount2("./36/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/binderfs") = 0 umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./36/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./36") = 0 mkdir("./37", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5179 ./strace-static-x86_64: Process 5179 attached [pid 5179] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5179] chdir("./37") = 0 [pid 5179] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5179] setpgid(0, 0) = 0 [pid 5179] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5179] write(3, "1000", 4) = 4 [pid 5179] close(3) = 0 [pid 5179] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5179] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5179] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5179] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5179] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5179] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5179] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5179] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5180 attached => {parent_tid=[5180]}, 88) = 5180 [pid 5179] rt_sigprocmask(SIG_SETMASK, [], [pid 5180] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5180] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5180] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5180] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5179] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5179] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5179] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5179] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5180] <... futex resumed>) = 0 [ 55.824552][ T5177] loop0: detected capacity change from 0 to 512 [ 55.842316][ T5177] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5179] <... mmap resumed>) = 0x7f81bb17d000 [pid 5180] memfd_create("syzkaller", 0) = 3 [pid 5180] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5179] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5179] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5179] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5180] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144./strace-static-x86_64: Process 5181 attached [pid 5181] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5179] <... clone3 resumed> => {parent_tid=[5181]}, 88) = 5181 [pid 5181] <... rseq resumed>) = 0 [pid 5179] rt_sigprocmask(SIG_SETMASK, [], [pid 5181] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5180] <... write resumed>) = 262144 [pid 5179] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5180] munmap(0x7f81b2d7d000, 262144 [pid 5181] rt_sigprocmask(SIG_SETMASK, [], [pid 5179] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5179] <... futex resumed>) = 0 [pid 5181] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5179] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5180] <... munmap resumed>) = 0 [pid 5180] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5180] ioctl(5, LOOP_SET_FD, 3 [pid 5181] <... open resumed>) = 4 [pid 5181] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5179] <... futex resumed>) = 0 [pid 5181] <... futex resumed>) = 1 [pid 5181] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5179] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5179] <... futex resumed>) = 0 [pid 5181] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5179] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5181] <... mount resumed>) = 0 [pid 5180] <... ioctl resumed>) = 0 [pid 5180] close(3) = 0 [pid 5180] mkdir("./file1", 0777 [pid 5181] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5179] <... futex resumed>) = 0 [pid 5181] <... futex resumed>) = 1 [pid 5179] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5179] <... futex resumed>) = 0 [pid 5181] <... open resumed>) = 3 [pid 5180] <... mkdir resumed>) = 0 [pid 5179] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5181] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5179] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5181] <... futex resumed>) = 0 [pid 5179] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5180] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5179] <... futex resumed>) = 0 [pid 5179] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5181] <... write resumed>) = 262144 [pid 5181] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5179] <... futex resumed>) = 0 [pid 5181] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5180] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5180] ioctl(5, LOOP_CLR_FD) = 0 [pid 5180] close(5) = 0 [pid 5180] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5180] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5179] exit_group(0) = ? [pid 5181] <... futex resumed>) = ? [pid 5180] <... futex resumed>) = ? [pid 5180] +++ exited with 0 +++ [pid 5181] +++ exited with 0 +++ [pid 5179] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5179, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./37", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./37/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./37/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/bus") = 0 umount2("./37/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/binderfs") = 0 umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./37/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./37") = 0 mkdir("./38", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 [ 55.896785][ T5180] loop0: detected capacity change from 0 to 512 [ 55.912410][ T5180] EXT4-fs (loop0): VFS: Can't find ext4 filesystem clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5182 ./strace-static-x86_64: Process 5182 attached [pid 5182] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5182] chdir("./38") = 0 [pid 5182] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5182] setpgid(0, 0) = 0 [pid 5182] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5182] write(3, "1000", 4) = 4 [pid 5182] close(3) = 0 [pid 5182] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5182] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5182] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5182] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5182] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5182] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5182] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5182] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5183 attached => {parent_tid=[5183]}, 88) = 5183 [pid 5182] rt_sigprocmask(SIG_SETMASK, [], [pid 5183] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5183] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5182] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5183] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5182] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5182] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] memfd_create("syzkaller", 0 [pid 5182] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5183] <... memfd_create resumed>) = 3 [pid 5183] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5182] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5182] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5182] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5182] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0}./strace-static-x86_64: Process 5184 attached => {parent_tid=[5184]}, 88) = 5184 [pid 5184] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053 [pid 5182] rt_sigprocmask(SIG_SETMASK, [], [pid 5184] <... rseq resumed>) = 0 [pid 5182] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5184] set_robust_list(0x7f81b2d9d9a0, 24 [pid 5182] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5184] <... set_robust_list resumed>) = 0 [pid 5184] rt_sigprocmask(SIG_SETMASK, [], [pid 5182] <... futex resumed>) = 0 [pid 5182] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5184] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5184] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5183] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5184] <... open resumed>) = 4 [pid 5184] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5182] <... futex resumed>) = 0 [pid 5184] <... futex resumed>) = 1 [pid 5182] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5184] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5183] <... write resumed>) = 262144 [pid 5182] <... futex resumed>) = 0 [pid 5183] munmap(0x7f81b2d9e000, 262144 [pid 5184] <... mount resumed>) = 0 [pid 5182] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5184] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5183] <... munmap resumed>) = 0 [pid 5184] <... futex resumed>) = 0 [pid 5182] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5184] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5182] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5184] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5182] <... futex resumed>) = 0 [pid 5183] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5184] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5182] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5183] <... openat resumed>) = 6 [pid 5183] ioctl(6, LOOP_SET_FD, 3 [pid 5184] <... open resumed>) = 5 [pid 5184] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5182] <... futex resumed>) = 0 [pid 5182] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5184] <... futex resumed>) = 1 [pid 5182] <... futex resumed>) = 0 [pid 5184] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5182] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5183] <... ioctl resumed>) = 0 [pid 5183] close(3) = 0 [pid 5183] mkdir("./file1", 0777) = 0 [pid 5183] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5184] <... write resumed>) = -1 EIO (Input/output error) [pid 5184] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5182] <... futex resumed>) = 0 [pid 5184] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5183] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5183] ioctl(6, LOOP_CLR_FD) = 0 [pid 5183] close(6) = 0 [pid 5183] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5182] exit_group(0) = ? [pid 5184] <... futex resumed>) = ? [pid 5183] +++ exited with 0 +++ [pid 5184] +++ exited with 0 +++ [pid 5182] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5182, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./38", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./38/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./38/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/bus") = 0 umount2("./38/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/binderfs") = 0 umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./38/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./38") = 0 mkdir("./39", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5185 attached , child_tidptr=0x555556eda690) = 5185 [pid 5185] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5185] chdir("./39") = 0 [pid 5185] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5185] setpgid(0, 0) = 0 [pid 5185] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5185] write(3, "1000", 4) = 4 [pid 5185] close(3) = 0 [pid 5185] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5185] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5185] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5185] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5185] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5185] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5185] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5185] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5186]}, 88) = 5186 ./strace-static-x86_64: Process 5186 attached [pid 5185] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5186] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5185] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5185] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5185] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5186] <... rseq resumed>) = 0 [pid 5185] <... mmap resumed>) = 0x7f81bb17d000 [pid 5185] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5185] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5186] set_robust_list(0x7f81bb1be9a0, 24 [pid 5185] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5185] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5187 attached [pid 5187] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5185] <... clone3 resumed> => {parent_tid=[5187]}, 88) = 5187 [pid 5187] <... rseq resumed>) = 0 [pid 5185] rt_sigprocmask(SIG_SETMASK, [], [pid 5187] set_robust_list(0x7f81bb19d9a0, 24 [pid 5185] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5187] <... set_robust_list resumed>) = 0 [pid 5185] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5187] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5185] <... futex resumed>) = 0 [pid 5187] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5185] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5187] <... open resumed>) = 3 [pid 5186] <... set_robust_list resumed>) = 0 [pid 5186] rt_sigprocmask(SIG_SETMASK, [], [pid 5187] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5187] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5185] <... futex resumed>) = 0 [pid 5185] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5187] <... futex resumed>) = 0 [pid 5185] <... futex resumed>) = 1 [pid 5187] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5187] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5186] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5187] <... futex resumed>) = 0 [pid 5187] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5185] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5185] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5187] <... futex resumed>) = 0 [pid 5185] <... futex resumed>) = 1 [pid 5187] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 4 [pid 5185] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5187] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5186] memfd_create("syzkaller", 0 [pid 5187] <... futex resumed>) = 1 [pid 5185] <... futex resumed>) = 0 [pid 5186] <... memfd_create resumed>) = 5 [pid 5187] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5186] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5185] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5187] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5185] <... futex resumed>) = 0 [pid 5187] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5185] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5187] <... futex resumed>) = 0 [pid 5186] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5185] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5187] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5186] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5186] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5186] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [ 55.983039][ T5183] loop0: detected capacity change from 0 to 512 [ 55.989989][ T5184] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 55.999695][ T5184] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 56.011540][ T5183] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5186] ioctl(6, LOOP_SET_FD, 5) = 0 [pid 5186] close(5) = 0 [pid 5186] mkdir("./file1", 0777) = 0 [ 56.053425][ T5186] loop0: detected capacity change from 0 to 512 [ 56.078921][ T5186] EXT4-fs (loop0): 1 orphan inode deleted [ 56.084663][ T5186] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5186] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5186] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 5 [pid 5186] chdir("./file1") = 0 [pid 5186] ioctl(6, LOOP_CLR_FD) = 0 [pid 5186] close(6) = 0 [pid 5186] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5186] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5185] exit_group(0 [pid 5187] <... futex resumed>) = ? [pid 5187] +++ exited with 0 +++ [pid 5186] <... futex resumed>) = ? [pid 5185] <... exit_group resumed>) = ? [pid 5186] +++ exited with 0 +++ [pid 5185] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5185, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./39", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./39/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./39/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/bus") = 0 umount2("./39/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/binderfs") = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./39/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./39") = 0 mkdir("./40", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5190 attached , child_tidptr=0x555556eda690) = 5190 [pid 5190] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5190] chdir("./40") = 0 [pid 5190] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5190] setpgid(0, 0) = 0 [pid 5190] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5190] write(3, "1000", 4) = 4 [pid 5190] close(3) = 0 [pid 5190] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5190] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5190] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5190] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5190] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5190] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5191 attached => {parent_tid=[5191]}, 88) = 5191 [pid 5191] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5190] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5190] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5191] set_robust_list(0x7f81bb1be9a0, 24 [pid 5190] <... mmap resumed>) = 0x7f81bb17d000 [pid 5190] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5191] <... set_robust_list resumed>) = 0 [pid 5190] <... mprotect resumed>) = 0 [pid 5191] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5190] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5191] memfd_create("syzkaller", 0 [pid 5190] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5192 attached => {parent_tid=[5192]}, 88) = 5192 [pid 5192] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5190] rt_sigprocmask(SIG_SETMASK, [], [pid 5192] set_robust_list(0x7f81bb19d9a0, 24 [pid 5191] <... memfd_create resumed>) = 3 [pid 5190] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5191] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5192] <... set_robust_list resumed>) = 0 [pid 5192] rt_sigprocmask(SIG_SETMASK, [], [pid 5191] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5190] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5192] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5190] <... futex resumed>) = 0 [ 56.097838][ T5186] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/39/file1 supports timestamps until 2038-01-19 (0x7fffffff) [ 56.131738][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5190] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5192] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5191] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5192] <... open resumed>) = 4 [pid 5192] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5190] <... futex resumed>) = 0 [pid 5190] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5192] <... futex resumed>) = 1 [pid 5192] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5191] <... write resumed>) = 262144 [pid 5191] munmap(0x7f81b2d7d000, 262144 [pid 5192] <... mount resumed>) = 0 [pid 5192] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5190] <... futex resumed>) = 0 [pid 5190] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5192] <... futex resumed>) = 1 [pid 5192] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5192] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5190] <... futex resumed>) = 0 [pid 5190] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5191] <... munmap resumed>) = 0 [pid 5190] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5192] <... futex resumed>) = 1 [pid 5192] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5192] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5191] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5190] <... futex resumed>) = 0 [pid 5192] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5191] <... openat resumed>) = 6 [pid 5191] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5191] close(3) = 0 [pid 5191] mkdir("./file1", 0777) = 0 [pid 5191] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5191] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5191] chdir("./file1") = 0 [pid 5191] ioctl(6, LOOP_CLR_FD) = 0 [pid 5191] close(6) = 0 [pid 5191] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5190] exit_group(0 [pid 5191] <... futex resumed>) = ? [pid 5190] <... exit_group resumed>) = ? [pid 5192] <... futex resumed>) = ? [pid 5191] +++ exited with 0 +++ [pid 5192] +++ exited with 0 +++ [pid 5190] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5190, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./40", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./40/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./40/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/bus") = 0 umount2("./40/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/binderfs") = 0 [ 56.191396][ T5191] loop0: detected capacity change from 0 to 512 [ 56.208559][ T5191] EXT4-fs (loop0): 1 orphan inode deleted [ 56.214577][ T5191] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 56.227726][ T5191] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/40/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./40/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./40") = 0 mkdir("./41", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5195 attached , child_tidptr=0x555556eda690) = 5195 [pid 5195] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5195] chdir("./41") = 0 [pid 5195] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5195] setpgid(0, 0) = 0 [pid 5195] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5195] write(3, "1000", 4) = 4 [pid 5195] close(3) = 0 [pid 5195] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5195] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5195] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5195] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5195] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5195] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5195] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5195] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5196 attached [pid 5196] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5195] <... clone3 resumed> => {parent_tid=[5196]}, 88) = 5196 [pid 5196] set_robust_list(0x7f81bb1be9a0, 24 [pid 5195] rt_sigprocmask(SIG_SETMASK, [], [pid 5196] <... set_robust_list resumed>) = 0 [pid 5196] rt_sigprocmask(SIG_SETMASK, [], [pid 5195] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5196] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5195] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5196] memfd_create("syzkaller", 0 [pid 5195] <... futex resumed>) = 0 [pid 5195] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5195] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5196] <... memfd_create resumed>) = 3 [pid 5196] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5195] <... mmap resumed>) = 0x7f81bb17d000 [pid 5196] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5195] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5196] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5195] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5196] <... write resumed>) = 262144 [pid 5195] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5196] munmap(0x7f81b2d7d000, 262144./strace-static-x86_64: Process 5197 attached ) = 0 [pid 5196] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5197] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5195] <... clone3 resumed> => {parent_tid=[5197]}, 88) = 5197 [pid 5197] <... rseq resumed>) = 0 [pid 5195] rt_sigprocmask(SIG_SETMASK, [], [pid 5197] set_robust_list(0x7f81bb19d9a0, 24 [pid 5195] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5197] <... set_robust_list resumed>) = 0 [pid 5195] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5197] rt_sigprocmask(SIG_SETMASK, [], [pid 5195] <... futex resumed>) = 0 [pid 5197] <... rt_sigprocmask resumed>NULL, 8) = 0 [ 56.271161][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5195] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5197] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5196] <... openat resumed>) = 4 [pid 5196] ioctl(4, LOOP_SET_FD, 3 [pid 5197] <... open resumed>) = 5 [pid 5196] <... ioctl resumed>) = 0 [pid 5196] close(3) = 0 [pid 5196] mkdir("./file1", 0777 [pid 5197] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5196] <... mkdir resumed>) = 0 [pid 5196] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5197] <... futex resumed>) = 1 [pid 5195] <... futex resumed>) = 0 [pid 5197] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5195] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5197] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5195] <... futex resumed>) = 0 [pid 5197] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5195] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5197] <... mount resumed>) = 0 [pid 5197] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5195] <... futex resumed>) = 0 [pid 5197] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5195] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5197] <... open resumed>) = 3 [pid 5195] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5197] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5195] <... futex resumed>) = 0 [pid 5197] <... futex resumed>) = 1 [pid 5195] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5197] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5195] <... futex resumed>) = 0 [pid 5195] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5197] <... write resumed>) = 262144 [pid 5197] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5195] <... futex resumed>) = 0 [pid 5197] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5196] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5196] ioctl(4, LOOP_CLR_FD) = 0 [pid 5196] close(4) = 0 [pid 5196] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5195] exit_group(0) = ? [pid 5197] <... futex resumed>) = ? [pid 5196] +++ exited with 0 +++ [pid 5197] +++ exited with 0 +++ [pid 5195] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5195, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./41", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./41/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./41/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/bus") = 0 umount2("./41/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/binderfs") = 0 umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./41/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./41") = 0 mkdir("./42", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5198 ./strace-static-x86_64: Process 5198 attached [pid 5198] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5198] chdir("./42") = 0 [pid 5198] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5198] setpgid(0, 0) = 0 [pid 5198] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5198] write(3, "1000", 4) = 4 [pid 5198] close(3) = 0 [pid 5198] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5198] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5198] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5198] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5198] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5198] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5198] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5198] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5199]}, 88) = 5199 [pid 5198] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5198] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 5199 attached [pid 5199] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5198] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5198] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5198] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5199] <... rseq resumed>) = 0 [pid 5199] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5199] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5198] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5198] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5199] memfd_create("syzkaller", 0) = 3 [pid 5199] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0./strace-static-x86_64: Process 5200 attached [pid 5198] <... clone3 resumed> => {parent_tid=[5200]}, 88) = 5200 [pid 5200] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5199] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5198] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5198] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5198] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5200] <... rseq resumed>) = 0 [pid 5200] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5200] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5200] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5199] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5200] <... open resumed>) = 4 [pid 5200] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5199] <... write resumed>) = 262144 [pid 5198] <... futex resumed>) = 0 [pid 5200] <... futex resumed>) = 1 [pid 5198] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5200] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5199] munmap(0x7f81b2d7d000, 262144 [pid 5198] <... futex resumed>) = 0 [pid 5200] <... mount resumed>) = 0 [ 56.336874][ T5196] loop0: detected capacity change from 0 to 512 [ 56.355153][ T5196] EXT4-fs warning (device loop0): read_mmp_block:115: Error -117 while reading MMP block 8 [pid 5199] <... munmap resumed>) = 0 [pid 5198] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5200] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5200] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5198] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5198] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5200] <... futex resumed>) = 0 [pid 5199] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5198] <... futex resumed>) = 1 [pid 5200] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5198] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5200] <... open resumed>) = 6 [pid 5199] <... openat resumed>) = 5 [pid 5200] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5199] ioctl(5, LOOP_SET_FD, 3 [pid 5200] <... futex resumed>) = 1 [pid 5198] <... futex resumed>) = 0 [pid 5198] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5200] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5198] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5199] <... ioctl resumed>) = 0 [pid 5199] close(3) = 0 [pid 5199] mkdir("./file1", 0777) = 0 [pid 5199] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5200] <... write resumed>) = -1 EIO (Input/output error) [pid 5200] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5198] <... futex resumed>) = 0 [pid 5200] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5199] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5199] ioctl(5, LOOP_CLR_FD) = 0 [pid 5199] close(5) = 0 [pid 5199] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5199] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5198] exit_group(0 [pid 5199] <... futex resumed>) = ? [pid 5200] <... futex resumed>) = ? [pid 5199] +++ exited with 0 +++ [pid 5200] +++ exited with 0 +++ [pid 5198] <... exit_group resumed>) = ? [pid 5198] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5198, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./42", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./42/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./42/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/bus") = 0 umount2("./42/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/binderfs") = 0 umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./42/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./42") = 0 mkdir("./43", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 56.419713][ T5199] loop0: detected capacity change from 0 to 512 [ 56.429292][ T5200] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 56.439634][ T5200] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 56.453579][ T5199] EXT4-fs (loop0): VFS: Can't find ext4 filesystem ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5201 attached , child_tidptr=0x555556eda690) = 5201 [pid 5201] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5201] chdir("./43") = 0 [pid 5201] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5201] setpgid(0, 0) = 0 [pid 5201] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5201] write(3, "1000", 4) = 4 [pid 5201] close(3) = 0 [pid 5201] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5201] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5201] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5201] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5201] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5201] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5201] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5201] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5202]}, 88) = 5202 ./strace-static-x86_64: Process 5202 attached [pid 5202] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5201] rt_sigprocmask(SIG_SETMASK, [], [pid 5202] <... rseq resumed>) = 0 [pid 5202] set_robust_list(0x7f81bb1be9a0, 24 [pid 5201] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5202] <... set_robust_list resumed>) = 0 [pid 5201] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5201] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5201] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5201] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5202] rt_sigprocmask(SIG_SETMASK, [], [pid 5201] <... mprotect resumed>) = 0 [pid 5201] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5201] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5202] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5201] <... clone3 resumed> => {parent_tid=[5203]}, 88) = 5203 [pid 5201] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5203 attached [pid 5202] memfd_create("syzkaller", 0 [pid 5201] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5203] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5201] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5201] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5203] <... rseq resumed>) = 0 [pid 5202] <... memfd_create resumed>) = 3 [pid 5203] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5202] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5203] rt_sigprocmask(SIG_SETMASK, [], [pid 5202] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5203] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5203] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5203] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5201] <... futex resumed>) = 0 [pid 5203] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5201] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5203] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5202] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5201] <... futex resumed>) = 0 [pid 5203] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5201] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5203] <... mount resumed>) = 0 [pid 5202] <... write resumed>) = 262144 [pid 5202] munmap(0x7f81b2d7d000, 262144 [pid 5203] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5201] <... futex resumed>) = 0 [pid 5203] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5201] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5202] <... munmap resumed>) = 0 [pid 5202] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5203] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5202] <... openat resumed>) = 5 [pid 5201] <... futex resumed>) = 0 [pid 5203] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5201] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5202] ioctl(5, LOOP_SET_FD, 3 [pid 5203] <... open resumed>) = 6 [pid 5203] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5201] <... futex resumed>) = 0 [pid 5203] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5201] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5203] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5201] <... futex resumed>) = 0 [pid 5201] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5202] <... ioctl resumed>) = 0 [pid 5202] close(3) = 0 [pid 5202] mkdir("./file1", 0777) = 0 [pid 5202] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5203] <... write resumed>) = 262144 [pid 5203] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5201] <... futex resumed>) = 0 [pid 5203] <... futex resumed>) = 1 [pid 5203] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5202] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5202] ioctl(5, LOOP_CLR_FD) = 0 [pid 5202] close(5) = 0 [pid 5202] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5202] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5201] exit_group(0 [pid 5203] <... futex resumed>) = ? [pid 5201] <... exit_group resumed>) = ? [pid 5203] +++ exited with 0 +++ [pid 5202] <... futex resumed>) = ? [pid 5202] +++ exited with 0 +++ [pid 5201] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5201, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./43", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./43/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./43/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/bus") = 0 umount2("./43/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/binderfs") = 0 umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./43/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./43") = 0 mkdir("./44", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5204 attached , child_tidptr=0x555556eda690) = 5204 [pid 5204] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5204] chdir("./44") = 0 [pid 5204] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5204] setpgid(0, 0) = 0 [pid 5204] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5204] write(3, "1000", 4) = 4 [pid 5204] close(3) = 0 [pid 5204] symlink("/dev/binderfs", "./binderfs") = 0 [ 56.541145][ T5202] loop0: detected capacity change from 0 to 512 [ 56.553830][ T5202] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5204] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5204] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5204] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5204] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5204] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5204] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5204] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5205 attached => {parent_tid=[5205]}, 88) = 5205 [pid 5204] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5205] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5205] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5205] rt_sigprocmask(SIG_SETMASK, [], [pid 5204] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5205] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5204] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5204] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5205] memfd_create("syzkaller", 0 [pid 5204] <... mmap resumed>) = 0x7f81bb17d000 [pid 5204] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5204] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5205] <... memfd_create resumed>) = 3 [pid 5204] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5205] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5204] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5206 attached [pid 5206] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5204] <... clone3 resumed> => {parent_tid=[5206]}, 88) = 5206 [pid 5206] <... rseq resumed>) = 0 [pid 5204] rt_sigprocmask(SIG_SETMASK, [], [pid 5206] set_robust_list(0x7f81bb19d9a0, 24 [pid 5204] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5206] <... set_robust_list resumed>) = 0 [pid 5206] rt_sigprocmask(SIG_SETMASK, [], [pid 5204] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5206] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5204] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5206] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5205] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5206] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5204] <... futex resumed>) = 0 [pid 5206] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5204] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5206] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5204] <... futex resumed>) = 0 [pid 5206] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5204] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5206] <... mount resumed>) = 0 [pid 5206] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5205] <... write resumed>) = 262144 [pid 5204] <... futex resumed>) = 0 [pid 5206] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5205] munmap(0x7f81b2d7d000, 262144 [pid 5204] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5206] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5204] <... futex resumed>) = 0 [pid 5206] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5204] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5206] <... open resumed>) = 5 [pid 5206] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5205] <... munmap resumed>) = 0 [pid 5206] <... futex resumed>) = 1 [pid 5204] <... futex resumed>) = 0 [pid 5206] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5204] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5206] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5204] <... futex resumed>) = 0 [pid 5206] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5204] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5206] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5205] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5206] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5205] <... openat resumed>) = 6 [pid 5206] <... futex resumed>) = 1 [pid 5204] <... futex resumed>) = 0 [pid 5206] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5205] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5205] close(3) = 0 [pid 5205] mkdir("./file1", 0777) = 0 [pid 5205] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5205] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5205] chdir("./file1") = 0 [pid 5205] ioctl(6, LOOP_CLR_FD) = 0 [pid 5205] close(6) = 0 [pid 5205] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5205] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5204] exit_group(0) = ? [pid 5206] <... futex resumed>) = ? [pid 5205] <... futex resumed>) = ? [pid 5206] +++ exited with 0 +++ [pid 5205] +++ exited with 0 +++ [pid 5204] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5204, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./44", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./44/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./44/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/bus") = 0 umount2("./44/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/binderfs") = 0 [ 56.623853][ T5205] loop0: detected capacity change from 0 to 512 [ 56.638313][ T5205] EXT4-fs (loop0): 1 orphan inode deleted [ 56.644059][ T5205] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 56.656592][ T5205] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/44/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./44/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./44") = 0 mkdir("./45", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5209 attached , child_tidptr=0x555556eda690) = 5209 [pid 5209] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5209] chdir("./45") = 0 [pid 5209] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5209] setpgid(0, 0) = 0 [pid 5209] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5209] write(3, "1000", 4) = 4 [pid 5209] close(3) = 0 [pid 5209] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5209] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5209] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5209] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5209] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5209] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5209] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5209] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5210 attached [pid 5210] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5210] set_robust_list(0x7f81bb1be9a0, 24 [pid 5209] <... clone3 resumed> => {parent_tid=[5210]}, 88) = 5210 [pid 5210] <... set_robust_list resumed>) = 0 [pid 5209] rt_sigprocmask(SIG_SETMASK, [], [pid 5210] rt_sigprocmask(SIG_SETMASK, [], [pid 5209] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5210] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5209] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5210] memfd_create("syzkaller", 0 [pid 5209] <... futex resumed>) = 0 [ 56.680471][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5209] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5209] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5209] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5209] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5209] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5211]}, 88) = 5211 [pid 5209] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5209] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5209] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5211 attached [pid 5211] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5211] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5211] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5211] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5210] <... memfd_create resumed>) = 4 [pid 5211] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5211] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5210] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5210] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5210] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5210] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5210] ioctl(5, LOOP_SET_FD, 4 [pid 5209] <... futex resumed>) = 0 [pid 5209] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5209] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5211] <... futex resumed>) = 0 [pid 5211] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5211] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5209] <... futex resumed>) = 0 [pid 5209] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5209] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5211] <... futex resumed>) = 1 [pid 5211] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5211] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5209] <... futex resumed>) = 0 [pid 5209] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5209] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5211] <... futex resumed>) = 1 [pid 5211] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5210] <... ioctl resumed>) = 0 [pid 5210] close(4) = 0 [pid 5210] mkdir("./file1", 0777) = 0 [pid 5210] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5211] <... write resumed>) = 262144 [pid 5211] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5209] <... futex resumed>) = 0 [ 56.721543][ T5210] __do_sys_memfd_create: 35 callbacks suppressed [ 56.721558][ T5210] syz-executor212[5210]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 56.727349][ T28] kauditd_printk_skb: 35 callbacks suppressed [ 56.727361][ T28] audit: type=1800 audit(1693866687.471:47): pid=5211 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 56.751126][ T5210] loop0: detected capacity change from 0 to 512 [pid 5211] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5210] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5210] ioctl(5, LOOP_CLR_FD) = 0 [pid 5210] close(5) = 0 [pid 5210] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5209] exit_group(0 [pid 5210] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5209] <... exit_group resumed>) = ? [pid 5211] <... futex resumed>) = ? [pid 5211] +++ exited with 0 +++ [pid 5210] <... futex resumed>) = ? [pid 5210] +++ exited with 0 +++ [pid 5209] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5209, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./45", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./45/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./45/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/bus") = 0 umount2("./45/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/binderfs") = 0 umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./45/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./45") = 0 mkdir("./46", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5212 attached , child_tidptr=0x555556eda690) = 5212 [pid 5212] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5212] chdir("./46") = 0 [pid 5212] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5212] setpgid(0, 0) = 0 [pid 5212] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5212] write(3, "1000", 4) = 4 [pid 5212] close(3) = 0 [pid 5212] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5212] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5212] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5212] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [ 56.782680][ T5210] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5212] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5212] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5212] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5212] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5213 attached => {parent_tid=[5213]}, 88) = 5213 [pid 5212] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5212] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5213] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5213] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5212] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5212] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5213] rt_sigprocmask(SIG_SETMASK, [], [pid 5212] <... mmap resumed>) = 0x7f81bb17d000 [pid 5213] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5213] memfd_create("syzkaller", 0 [pid 5212] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5212] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5212] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5214 attached => {parent_tid=[5214]}, 88) = 5214 [pid 5214] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5212] rt_sigprocmask(SIG_SETMASK, [], [pid 5214] <... rseq resumed>) = 0 [pid 5212] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5214] set_robust_list(0x7f81bb19d9a0, 24 [pid 5212] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5214] <... set_robust_list resumed>) = 0 [pid 5212] <... futex resumed>) = 0 [pid 5214] rt_sigprocmask(SIG_SETMASK, [], [pid 5212] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5214] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5214] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5213] <... memfd_create resumed>) = 4 [pid 5213] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5213] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5213] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5213] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5213] ioctl(5, LOOP_SET_FD, 4 [pid 5214] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5212] <... futex resumed>) = 0 [pid 5214] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5212] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5214] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5212] <... futex resumed>) = 0 [pid 5214] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5212] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5214] <... mount resumed>) = 0 [pid 5214] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5212] <... futex resumed>) = 0 [pid 5214] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5212] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5214] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5212] <... futex resumed>) = 0 [pid 5214] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5212] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5214] <... open resumed>) = 6 [pid 5214] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5212] <... futex resumed>) = 0 [pid 5214] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [ 56.849492][ T5213] syz-executor212[5213]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 56.853316][ T28] audit: type=1800 audit(1693866687.591:48): pid=5214 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 56.880727][ T5213] loop0: detected capacity change from 0 to 512 [ 56.887198][ T5214] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [pid 5212] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5214] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5212] <... futex resumed>) = 0 [pid 5214] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5212] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5213] <... ioctl resumed>) = 0 [pid 5213] close(4) = 0 [pid 5213] mkdir("./file1", 0777) = 0 [pid 5213] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5214] <... write resumed>) = -1 EIO (Input/output error) [pid 5214] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5212] <... futex resumed>) = 0 [pid 5214] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5213] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5213] ioctl(5, LOOP_CLR_FD) = 0 [pid 5213] close(5) = 0 [pid 5213] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5213] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5212] exit_group(0) = ? [pid 5214] <... futex resumed>) = ? [pid 5214] +++ exited with 0 +++ [pid 5213] <... futex resumed>) = ? [pid 5213] +++ exited with 0 +++ [pid 5212] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5212, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./46", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./46/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./46/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/bus") = 0 umount2("./46/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/binderfs") = 0 umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./46/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./46/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./46") = 0 mkdir("./47", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5215 attached , child_tidptr=0x555556eda690) = 5215 [pid 5215] set_robust_list(0x555556eda6a0, 24) = 0 [ 56.887225][ T5214] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 56.887254][ T5214] I/O error, dev loop0, sector 240 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 56.914991][ T5214] Buffer I/O error on dev loop0, logical block 30, lost async page write [ 56.927461][ T5213] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5215] chdir("./47") = 0 [pid 5215] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5215] setpgid(0, 0) = 0 [pid 5215] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5215] write(3, "1000", 4) = 4 [pid 5215] close(3) = 0 [pid 5215] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5215] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5215] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5215] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5215] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5215] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5215] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5215] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5216]}, 88) = 5216 ./strace-static-x86_64: Process 5216 attached [pid 5216] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5215] rt_sigprocmask(SIG_SETMASK, [], [pid 5216] <... rseq resumed>) = 0 [pid 5215] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5216] set_robust_list(0x7f81bb1be9a0, 24 [pid 5215] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5216] <... set_robust_list resumed>) = 0 [pid 5215] <... futex resumed>) = 0 [pid 5215] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5215] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5215] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5215] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5216] rt_sigprocmask(SIG_SETMASK, [], [pid 5215] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5216] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5215] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5216] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5217 attached [pid 5217] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5215] <... clone3 resumed> => {parent_tid=[5217]}, 88) = 5217 [pid 5217] <... rseq resumed>) = 0 [pid 5215] rt_sigprocmask(SIG_SETMASK, [], [pid 5217] set_robust_list(0x7f81bb19d9a0, 24 [pid 5215] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5217] <... set_robust_list resumed>) = 0 [pid 5215] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5217] rt_sigprocmask(SIG_SETMASK, [], [pid 5215] <... futex resumed>) = 0 [pid 5217] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5215] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5217] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5217] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5215] <... futex resumed>) = 0 [pid 5217] <... futex resumed>) = 1 [pid 5215] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5217] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5215] <... futex resumed>) = 0 [pid 5217] <... mount resumed>) = 0 [pid 5215] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5217] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5215] <... futex resumed>) = 0 [pid 5215] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5215] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5217] <... futex resumed>) = 1 [pid 5217] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 4 [pid 5217] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5215] <... futex resumed>) = 0 [pid 5217] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5215] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5217] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5215] <... futex resumed>) = 0 [pid 5217] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5215] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5217] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5215] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5217] <... futex resumed>) = 0 [pid 5217] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5216] <... memfd_create resumed>) = 5 [pid 5216] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5216] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5216] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5216] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5216] ioctl(6, LOOP_SET_FD, 5) = 0 [pid 5216] close(5) = 0 [pid 5216] mkdir("./file1", 0777) = 0 [ 56.999120][ T5216] syz-executor212[5216]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 57.009128][ T28] audit: type=1800 audit(1693866687.741:49): pid=5217 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 57.021959][ T5216] loop0: detected capacity change from 0 to 512 [pid 5216] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5216] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 5 [pid 5216] chdir("./file1") = 0 [pid 5216] ioctl(6, LOOP_CLR_FD) = 0 [pid 5216] close(6) = 0 [pid 5216] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5215] exit_group(0 [pid 5216] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5217] <... futex resumed>) = ? [pid 5216] <... futex resumed>) = ? [pid 5215] <... exit_group resumed>) = ? [pid 5217] +++ exited with 0 +++ [pid 5216] +++ exited with 0 +++ [pid 5215] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5215, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./47", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./47/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./47/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/bus") = 0 umount2("./47/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/binderfs") = 0 [ 57.047532][ T5216] EXT4-fs (loop0): 1 orphan inode deleted [ 57.053304][ T5216] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 57.066026][ T5216] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/47/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./47/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./47") = 0 mkdir("./48", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5220 attached , child_tidptr=0x555556eda690) = 5220 [pid 5220] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5220] chdir("./48") = 0 [pid 5220] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5220] setpgid(0, 0) = 0 [pid 5220] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5220] write(3, "1000", 4) = 4 [pid 5220] close(3) = 0 [pid 5220] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5220] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5220] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5220] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5220] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5220] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5220] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5220] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5221 attached [pid 5221] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5220] <... clone3 resumed> => {parent_tid=[5221]}, 88) = 5221 [pid 5221] set_robust_list(0x7f81bb1be9a0, 24 [pid 5220] rt_sigprocmask(SIG_SETMASK, [], [pid 5221] <... set_robust_list resumed>) = 0 [pid 5220] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5221] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5220] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5221] memfd_create("syzkaller", 0 [pid 5220] <... futex resumed>) = 0 [pid 5220] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 57.091784][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5220] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5220] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5221] <... memfd_create resumed>) = 3 [pid 5220] <... mprotect resumed>) = 0 [pid 5221] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5220] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5221] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5220] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5222 attached [pid 5221] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5222] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5220] <... clone3 resumed> => {parent_tid=[5222]}, 88) = 5222 [pid 5222] <... rseq resumed>) = 0 [pid 5220] rt_sigprocmask(SIG_SETMASK, [], [pid 5222] set_robust_list(0x7f81bb19d9a0, 24 [pid 5220] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5222] <... set_robust_list resumed>) = 0 [pid 5220] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5222] rt_sigprocmask(SIG_SETMASK, [], [pid 5220] <... futex resumed>) = 0 [pid 5222] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5220] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5222] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5221] <... write resumed>) = 262144 [pid 5222] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5222] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5220] <... futex resumed>) = 0 [pid 5222] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5220] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5222] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5220] <... futex resumed>) = 0 [pid 5222] <... mount resumed>) = 0 [pid 5220] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5222] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5220] <... futex resumed>) = 0 [pid 5220] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5220] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5222] <... futex resumed>) = 1 [pid 5222] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5222] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5220] <... futex resumed>) = 0 [pid 5220] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5222] <... futex resumed>) = 1 [pid 5220] <... futex resumed>) = 0 [pid 5222] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5220] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5222] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5222] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5222] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5220] <... futex resumed>) = 0 [pid 5221] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5221] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5221] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5221] close(3) = 0 [pid 5221] mkdir("./file1", 0777) = 0 [ 57.130767][ T5221] syz-executor212[5221]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 57.147937][ T28] audit: type=1800 audit(1693866687.891:50): pid=5222 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 57.169730][ T5221] loop0: detected capacity change from 0 to 512 [pid 5221] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5221] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5221] chdir("./file1") = 0 [pid 5221] ioctl(6, LOOP_CLR_FD) = 0 [pid 5221] close(6) = 0 [pid 5221] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5220] exit_group(0) = ? [pid 5221] +++ exited with 0 +++ [pid 5222] <... futex resumed>) = ? [pid 5222] +++ exited with 0 +++ [pid 5220] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5220, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./48", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./48/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./48/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/bus") = 0 umount2("./48/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/binderfs") = 0 [ 57.187835][ T5221] EXT4-fs (loop0): 1 orphan inode deleted [ 57.193773][ T5221] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 57.206704][ T5221] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/48/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./48/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./48") = 0 mkdir("./49", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5225 attached , child_tidptr=0x555556eda690) = 5225 [pid 5225] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5225] chdir("./49") = 0 [pid 5225] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5225] setpgid(0, 0) = 0 [pid 5225] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5225] write(3, "1000", 4) = 4 [pid 5225] close(3) = 0 [pid 5225] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5225] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5225] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5225] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5225] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5225] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5225] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5225] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5226 attached [pid 5226] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5225] <... clone3 resumed> => {parent_tid=[5226]}, 88) = 5226 [pid 5226] <... rseq resumed>) = 0 [pid 5225] rt_sigprocmask(SIG_SETMASK, [], [pid 5226] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5225] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5226] rt_sigprocmask(SIG_SETMASK, [], [pid 5225] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5226] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5225] <... futex resumed>) = 0 [pid 5226] memfd_create("syzkaller", 0 [pid 5225] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5225] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5225] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5225] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5225] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5227]}, 88) = 5227 [pid 5225] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [ 57.238481][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5225] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5225] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5227 attached [pid 5227] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5227] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5227] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5227] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5227] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5226] <... memfd_create resumed>) = 4 [pid 5227] <... futex resumed>) = 1 [pid 5225] <... futex resumed>) = 0 [pid 5225] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5225] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5227] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5226] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5227] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5225] <... futex resumed>) = 0 [pid 5227] <... futex resumed>) = 1 [pid 5225] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5227] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5226] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5225] <... futex resumed>) = 0 [pid 5227] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5225] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5227] <... futex resumed>) = 0 [pid 5225] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5227] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5225] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5227] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5225] <... futex resumed>) = 0 [pid 5227] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5225] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5227] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5227] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5225] <... futex resumed>) = 0 [pid 5227] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5226] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5226] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5226] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5226] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5226] close(4) = 0 [pid 5226] mkdir("./file1", 0777) = 0 [ 57.288168][ T5226] syz-executor212[5226]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 57.294569][ T28] audit: type=1800 audit(1693866688.031:51): pid=5227 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 57.325576][ T5226] loop0: detected capacity change from 0 to 512 [pid 5226] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5226] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5226] chdir("./file1") = 0 [pid 5226] ioctl(6, LOOP_CLR_FD) = 0 [pid 5226] close(6) = 0 [pid 5226] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5226] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5225] exit_group(0 [pid 5227] <... futex resumed>) = ? [pid 5226] <... futex resumed>) = ? [pid 5225] <... exit_group resumed>) = ? [pid 5226] +++ exited with 0 +++ [pid 5227] +++ exited with 0 +++ [pid 5225] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5225, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./49", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./49/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./49/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/bus") = 0 umount2("./49/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/binderfs") = 0 [ 57.348422][ T5226] EXT4-fs (loop0): 1 orphan inode deleted [ 57.354385][ T5226] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 57.367332][ T5226] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/49/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./49/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./49") = 0 mkdir("./50", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5231 attached , child_tidptr=0x555556eda690) = 5231 [pid 5231] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5231] chdir("./50") = 0 [pid 5231] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5231] setpgid(0, 0) = 0 [pid 5231] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5231] write(3, "1000", 4) = 4 [pid 5231] close(3) = 0 [pid 5231] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5231] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5231] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5231] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5231] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5231] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5231] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5231] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5232 attached [pid 5232] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5231] <... clone3 resumed> => {parent_tid=[5232]}, 88) = 5232 [pid 5232] <... rseq resumed>) = 0 [pid 5231] rt_sigprocmask(SIG_SETMASK, [], [pid 5232] set_robust_list(0x7f81bb1be9a0, 24 [pid 5231] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5232] <... set_robust_list resumed>) = 0 [pid 5231] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5232] rt_sigprocmask(SIG_SETMASK, [], [pid 5231] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5232] <... rt_sigprocmask resumed>NULL, 8) = 0 [ 57.396570][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5232] memfd_create("syzkaller", 0 [pid 5231] <... futex resumed>) = 0 [pid 5231] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5231] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5231] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5231] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5233]}, 88) = 5233 [pid 5231] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5231] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5231] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5233 attached [pid 5233] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5233] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5233] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5232] <... memfd_create resumed>) = 3 [pid 5232] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5233] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5232] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5233] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5233] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5231] <... futex resumed>) = 0 [pid 5231] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5233] <... futex resumed>) = 0 [pid 5233] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5232] <... write resumed>) = 262144 [pid 5233] <... mount resumed>) = 0 [pid 5232] munmap(0x7f81b2d7d000, 262144 [pid 5231] <... futex resumed>) = 1 [pid 5231] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5233] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5231] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5233] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5231] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5233] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5231] <... futex resumed>) = 0 [pid 5233] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5231] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5233] <... open resumed>) = 5 [pid 5233] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5231] <... futex resumed>) = 0 [pid 5233] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5231] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5233] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5231] <... futex resumed>) = 0 [pid 5233] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5231] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5233] <... futex resumed>) = 0 [pid 5231] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5233] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5232] <... munmap resumed>) = 0 [pid 5232] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5232] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5232] close(3) = 0 [pid 5232] mkdir("./file1", 0777) = 0 [ 57.446891][ T5232] syz-executor212[5232]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 57.460818][ T28] audit: type=1800 audit(1693866688.201:52): pid=5233 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 57.485428][ T5232] loop0: detected capacity change from 0 to 512 [pid 5232] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5232] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5232] chdir("./file1") = 0 [pid 5232] ioctl(6, LOOP_CLR_FD) = 0 [pid 5232] close(6) = 0 [pid 5232] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5231] exit_group(0 [pid 5233] <... futex resumed>) = ? [pid 5231] <... exit_group resumed>) = ? [pid 5233] +++ exited with 0 +++ [pid 5232] <... futex resumed>) = ? [pid 5232] +++ exited with 0 +++ [pid 5231] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5231, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./50", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./50/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./50/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/bus") = 0 umount2("./50/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 57.498099][ T5232] EXT4-fs (loop0): 1 orphan inode deleted [ 57.503855][ T5232] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 57.516405][ T5232] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/50/file1 supports timestamps until 2038-01-19 (0x7fffffff) newfstatat(AT_FDCWD, "./50/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/binderfs") = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./50/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./50/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./50") = 0 mkdir("./51", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 [ 57.541922][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5236 attached , child_tidptr=0x555556eda690) = 5236 [pid 5236] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5236] chdir("./51") = 0 [pid 5236] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5236] setpgid(0, 0) = 0 [pid 5236] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5236] write(3, "1000", 4) = 4 [pid 5236] close(3) = 0 [pid 5236] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5236] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5236] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5236] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5236] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5236] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5236] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5236] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5237 attached => {parent_tid=[5237]}, 88) = 5237 [pid 5237] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5236] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5236] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5236] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5236] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5237] <... rseq resumed>) = 0 [pid 5236] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5237] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5237] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5236] <... mprotect resumed>) = 0 [pid 5236] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5237] memfd_create("syzkaller", 0 [pid 5236] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5238]}, 88) = 5238 [pid 5236] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5236] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5236] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5238 attached [pid 5238] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5238] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5238] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5238] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5237] <... memfd_create resumed>) = 4 [pid 5237] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5237] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5238] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5236] <... futex resumed>) = 0 [pid 5238] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5236] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5238] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5236] <... futex resumed>) = 0 [pid 5238] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5236] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5238] <... mount resumed>) = 0 [pid 5238] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5236] <... futex resumed>) = 0 [pid 5238] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5236] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5238] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5236] <... futex resumed>) = 0 [pid 5238] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5236] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5238] <... open resumed>) = 5 [pid 5238] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5236] <... futex resumed>) = 0 [pid 5238] <... futex resumed>) = 1 [pid 5238] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5236] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5238] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5236] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5238] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5236] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5238] <... futex resumed>) = 0 [pid 5238] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5237] <... write resumed>) = 262144 [pid 5237] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5237] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5237] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5237] close(4) = 0 [pid 5237] mkdir("./file1", 0777) = 0 [ 57.597622][ T5237] syz-executor212[5237]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 57.600091][ T28] audit: type=1800 audit(1693866688.341:53): pid=5238 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 57.632098][ T5237] loop0: detected capacity change from 0 to 512 [pid 5237] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5237] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5237] chdir("./file1") = 0 [pid 5237] ioctl(6, LOOP_CLR_FD) = 0 [pid 5237] close(6) = 0 [pid 5237] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5237] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5236] exit_group(0 [pid 5238] <... futex resumed>) = ? [pid 5236] <... exit_group resumed>) = ? [pid 5237] <... futex resumed>) = ? [pid 5238] +++ exited with 0 +++ [pid 5237] +++ exited with 0 +++ [pid 5236] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5236, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./51", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./51/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./51/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/bus") = 0 umount2("./51/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/binderfs") = 0 [ 57.648234][ T5237] EXT4-fs (loop0): 1 orphan inode deleted [ 57.654150][ T5237] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 57.667059][ T5237] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/51/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./51/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./51/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./51") = 0 mkdir("./52", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5241 ./strace-static-x86_64: Process 5241 attached [pid 5241] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5241] chdir("./52") = 0 [pid 5241] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5241] setpgid(0, 0) = 0 [pid 5241] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5241] write(3, "1000", 4) = 4 [pid 5241] close(3) = 0 [pid 5241] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5241] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5241] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5241] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5241] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5241] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5241] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5241] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5242 attached [pid 5242] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5241] <... clone3 resumed> => {parent_tid=[5242]}, 88) = 5242 [pid 5242] <... rseq resumed>) = 0 [pid 5241] rt_sigprocmask(SIG_SETMASK, [], [pid 5242] set_robust_list(0x7f81bb1be9a0, 24 [pid 5241] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5242] <... set_robust_list resumed>) = 0 [pid 5241] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5242] rt_sigprocmask(SIG_SETMASK, [], [pid 5241] <... futex resumed>) = 0 [pid 5242] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5241] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5242] memfd_create("syzkaller", 0 [pid 5241] <... futex resumed>) = 0 [pid 5241] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5242] <... memfd_create resumed>) = 3 [pid 5242] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5241] <... mmap resumed>) = 0x7f81bb17d000 [pid 5242] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5241] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5242] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5241] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5241] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5243 attached [pid 5243] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5241] <... clone3 resumed> => {parent_tid=[5243]}, 88) = 5243 [pid 5243] <... rseq resumed>) = 0 [pid 5241] rt_sigprocmask(SIG_SETMASK, [], [pid 5243] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5241] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5243] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5241] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [ 57.697689][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 57.731892][ T5242] syz-executor212[5242]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [pid 5243] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5241] <... futex resumed>) = 0 [pid 5243] <... open resumed>) = 4 [pid 5241] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5243] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5243] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5242] <... write resumed>) = 262144 [pid 5242] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5242] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5242] ioctl(5, LOOP_SET_FD, 3 [pid 5241] <... futex resumed>) = 0 [pid 5241] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5241] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5243] <... futex resumed>) = 0 [pid 5243] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5243] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5241] <... futex resumed>) = 0 [pid 5241] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5241] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5243] <... futex resumed>) = 1 [pid 5243] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5242] <... ioctl resumed>) = 0 [pid 5242] close(3) = 0 [pid 5242] mkdir("./file1", 0777) = 0 [pid 5242] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5243] <... open resumed>) = 3 [pid 5243] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5241] <... futex resumed>) = 0 [pid 5241] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5241] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5243] <... futex resumed>) = 1 [pid 5243] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 262144 [pid 5242] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5243] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5241] <... futex resumed>) = 0 [pid 5243] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5242] ioctl(5, LOOP_CLR_FD) = 0 [pid 5242] close(5) = 0 [pid 5242] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5242] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5241] exit_group(0) = ? [pid 5243] <... futex resumed>) = ? [pid 5242] <... futex resumed>) = ? [pid 5243] +++ exited with 0 +++ [pid 5242] +++ exited with 0 +++ [pid 5241] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5241, si_uid=0, si_status=0, si_utime=0, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./52", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./52/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./52/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/bus") = 0 umount2("./52/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./52/binderfs") = 0 umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./52/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./52/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./52") = 0 mkdir("./53", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5244 attached , child_tidptr=0x555556eda690) = 5244 [pid 5244] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5244] chdir("./53") = 0 [pid 5244] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5244] setpgid(0, 0) = 0 [pid 5244] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5244] write(3, "1000", 4) = 4 [pid 5244] close(3) = 0 [pid 5244] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5244] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5244] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5244] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5244] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5244] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5244] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5245]}, 88) = 5245 [pid 5244] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5245 attached NULL, 8) = 0 [pid 5244] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5244] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5244] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5244] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5245] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5245] set_robust_list(0x7f81bb1be9a0, 24 [pid 5244] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5245] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 5246 attached [pid 5245] rt_sigprocmask(SIG_SETMASK, [], [pid 5246] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5245] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5246] <... rseq resumed>) = 0 [ 57.747579][ T28] audit: type=1800 audit(1693866688.491:54): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 57.757290][ T5242] loop0: detected capacity change from 0 to 512 [ 57.777363][ T5242] EXT4-fs (loop0): Magic mismatch, very weird! [pid 5246] set_robust_list(0x7f81bb19d9a0, 24 [pid 5245] memfd_create("syzkaller", 0 [pid 5244] <... clone3 resumed> => {parent_tid=[5246]}, 88) = 5246 [pid 5244] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5244] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5244] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5246] <... set_robust_list resumed>) = 0 [pid 5245] <... memfd_create resumed>) = 3 [pid 5246] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5245] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5246] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5245] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5246] <... open resumed>) = 4 [pid 5246] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5244] <... futex resumed>) = 0 [pid 5244] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5244] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5246] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5245] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5246] <... mount resumed>) = 0 [pid 5246] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5245] <... write resumed>) = 262144 [pid 5246] <... futex resumed>) = 1 [pid 5244] <... futex resumed>) = 0 [pid 5245] munmap(0x7f81b2d7d000, 262144 [pid 5246] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5244] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5246] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5244] <... futex resumed>) = 0 [pid 5244] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5246] <... open resumed>) = 5 [pid 5246] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5244] <... futex resumed>) = 0 [pid 5246] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5244] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5246] <... futex resumed>) = 0 [pid 5244] <... futex resumed>) = 1 [pid 5246] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5245] <... munmap resumed>) = 0 [pid 5244] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5246] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5245] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5246] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5244] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5246] <... futex resumed>) = 0 [pid 5246] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5245] <... openat resumed>) = 6 [pid 5245] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5245] close(3) = 0 [pid 5245] mkdir("./file1", 0777) = 0 [ 57.822670][ T5245] syz-executor212[5245]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 57.837473][ T28] audit: type=1800 audit(1693866688.581:55): pid=5246 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 57.862968][ T5245] loop0: detected capacity change from 0 to 512 [pid 5245] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5245] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5245] chdir("./file1") = 0 [pid 5245] ioctl(6, LOOP_CLR_FD) = 0 [pid 5245] close(6) = 0 [pid 5245] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5245] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5244] exit_group(0 [pid 5246] <... futex resumed>) = ? [pid 5246] +++ exited with 0 +++ [pid 5245] <... futex resumed>) = ? [pid 5244] <... exit_group resumed>) = ? [pid 5245] +++ exited with 0 +++ [pid 5244] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5244, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./53", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./53", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./53/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./53/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./53/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./53/bus") = 0 umount2("./53/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./53/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./53/binderfs") = 0 [ 57.877619][ T5245] EXT4-fs (loop0): 1 orphan inode deleted [ 57.883378][ T5245] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 57.896263][ T5245] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/53/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./53/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./53/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./53/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./53/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./53") = 0 mkdir("./54", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5249 attached [pid 5249] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5249] chdir("./54" [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5249 [pid 5249] <... chdir resumed>) = 0 [pid 5249] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5249] setpgid(0, 0) = 0 [pid 5249] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5249] write(3, "1000", 4) = 4 [pid 5249] close(3) = 0 [pid 5249] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5249] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5249] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5249] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5249] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5249] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5249] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5249] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5250 attached => {parent_tid=[5250]}, 88) = 5250 [pid 5250] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5249] rt_sigprocmask(SIG_SETMASK, [], [pid 5250] <... rseq resumed>) = 0 [pid 5249] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5249] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5250] set_robust_list(0x7f81bb1be9a0, 24 [pid 5249] <... futex resumed>) = 0 [pid 5250] <... set_robust_list resumed>) = 0 [pid 5249] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5250] rt_sigprocmask(SIG_SETMASK, [], [pid 5249] <... futex resumed>) = 0 [pid 5250] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5249] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5250] memfd_create("syzkaller", 0 [pid 5249] <... mmap resumed>) = 0x7f81bb17d000 [pid 5249] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5249] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5250] <... memfd_create resumed>) = 3 [pid 5249] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5250] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0./strace-static-x86_64: Process 5251 attached ) = 0x7f81b2d7d000 [pid 5251] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5249] <... clone3 resumed> => {parent_tid=[5251]}, 88) = 5251 [pid 5251] <... rseq resumed>) = 0 [pid 5250] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5249] rt_sigprocmask(SIG_SETMASK, [], [pid 5251] set_robust_list(0x7f81bb19d9a0, 24 [pid 5249] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5251] <... set_robust_list resumed>) = 0 [pid 5249] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5251] rt_sigprocmask(SIG_SETMASK, [], [pid 5249] <... futex resumed>) = 0 [pid 5251] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5249] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5251] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5250] <... write resumed>) = 262144 [pid 5250] munmap(0x7f81b2d7d000, 262144) = 0 [ 57.925162][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [ 57.967645][ T5250] syz-executor212[5250]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [pid 5251] <... open resumed>) = 4 [pid 5250] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5250] ioctl(5, LOOP_SET_FD, 3 [pid 5251] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5250] <... ioctl resumed>) = 0 [pid 5249] <... futex resumed>) = 0 [pid 5251] <... futex resumed>) = 1 [pid 5251] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5249] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5250] close(3) = 0 [pid 5251] <... mount resumed>) = 0 [pid 5249] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5250] mkdir("./file1", 0777 [pid 5251] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5250] <... mkdir resumed>) = 0 [pid 5250] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5251] <... futex resumed>) = 1 [pid 5249] <... futex resumed>) = 0 [pid 5251] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5249] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5251] <... open resumed>) = 3 [pid 5249] <... futex resumed>) = 0 [pid 5251] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5249] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5251] <... futex resumed>) = 0 [pid 5249] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5251] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5249] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5251] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5249] <... futex resumed>) = 0 [pid 5251] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5249] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5251] <... write resumed>) = 262144 [pid 5251] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5251] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5249] <... futex resumed>) = 0 [ 57.984549][ T28] audit: type=1800 audit(1693866688.721:56): pid=5251 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 58.005261][ T5250] loop0: detected capacity change from 0 to 512 [pid 5250] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5250] ioctl(5, LOOP_CLR_FD) = 0 [pid 5250] close(5) = 0 [pid 5250] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5250] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5249] exit_group(0) = ? [pid 5250] <... futex resumed>) = ? [pid 5250] +++ exited with 0 +++ [pid 5251] <... futex resumed>) = ? [pid 5251] +++ exited with 0 +++ [pid 5249] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5249, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./54", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./54", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./54/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./54/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./54/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./54/bus") = 0 umount2("./54/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./54/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./54/binderfs") = 0 umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./54/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./54/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./54/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./54/file1") = 0 [ 58.025672][ T5250] EXT4-fs warning (device loop0): read_mmp_block:115: Error -117 while reading MMP block 8 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./54") = 0 mkdir("./55", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5252 attached , child_tidptr=0x555556eda690) = 5252 [pid 5252] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5252] chdir("./55") = 0 [pid 5252] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5252] setpgid(0, 0) = 0 [pid 5252] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5252] write(3, "1000", 4) = 4 [pid 5252] close(3) = 0 [pid 5252] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5252] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5252] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5252] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5252] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5252] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5252] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5252] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5253 attached [pid 5253] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5252] <... clone3 resumed> => {parent_tid=[5253]}, 88) = 5253 [pid 5253] <... rseq resumed>) = 0 [pid 5252] rt_sigprocmask(SIG_SETMASK, [], [pid 5253] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5253] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5253] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5252] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5252] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5253] <... futex resumed>) = 0 [pid 5252] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5253] memfd_create("syzkaller", 0 [pid 5252] <... futex resumed>) = 0 [pid 5252] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5253] <... memfd_create resumed>) = 3 [pid 5252] <... mmap resumed>) = 0x7f81bb17d000 [pid 5253] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5252] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5253] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5252] <... mprotect resumed>) = 0 [pid 5252] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5252] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5253] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5252] <... clone3 resumed> => {parent_tid=[5254]}, 88) = 5254 [pid 5252] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5252] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5252] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5254 attached [pid 5254] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5254] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5254] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5254] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5253] <... write resumed>) = 262144 [pid 5254] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5253] munmap(0x7f81b2d7d000, 262144 [pid 5254] <... futex resumed>) = 1 [pid 5252] <... futex resumed>) = 0 [pid 5252] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5254] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5253] <... munmap resumed>) = 0 [pid 5252] <... futex resumed>) = 0 [pid 5254] <... mount resumed>) = 0 [pid 5253] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5252] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5254] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5252] <... futex resumed>) = 0 [pid 5254] <... futex resumed>) = 1 [pid 5252] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5253] <... openat resumed>) = 5 [pid 5254] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5252] <... futex resumed>) = 0 [pid 5254] <... open resumed>) = 6 [pid 5253] ioctl(5, LOOP_SET_FD, 3 [pid 5252] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5254] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5252] <... futex resumed>) = 0 [pid 5254] <... futex resumed>) = 1 [pid 5252] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5254] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5252] <... futex resumed>) = 0 [pid 5253] <... ioctl resumed>) = 0 [pid 5252] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5253] close(3) = 0 [pid 5253] mkdir("./file1", 0777) = 0 [pid 5253] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5254] <... write resumed>) = -1 EIO (Input/output error) [pid 5254] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5252] <... futex resumed>) = 0 [pid 5254] <... futex resumed>) = 1 [pid 5254] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5253] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5253] ioctl(5, LOOP_CLR_FD) = 0 [pid 5253] close(5) = 0 [pid 5253] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5253] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5252] exit_group(0) = ? [pid 5253] <... futex resumed>) = ? [pid 5254] <... futex resumed>) = ? [pid 5254] +++ exited with 0 +++ [pid 5253] +++ exited with 0 +++ [pid 5252] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5252, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./55", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./55", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./55/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./55/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./55/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./55/bus") = 0 umount2("./55/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./55/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./55/binderfs") = 0 umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./55/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./55/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./55/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./55/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./55") = 0 mkdir("./56", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5255 ./strace-static-x86_64: Process 5255 attached [pid 5255] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5255] chdir("./56") = 0 [pid 5255] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5255] setpgid(0, 0) = 0 [pid 5255] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5255] write(3, "1000", 4) = 4 [pid 5255] close(3) = 0 [pid 5255] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5255] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5255] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5255] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5255] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [ 58.106777][ T5253] loop0: detected capacity change from 0 to 512 [ 58.110599][ T5254] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 58.123325][ T5254] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 58.136371][ T5253] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5255] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5255] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5255] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5256 attached => {parent_tid=[5256]}, 88) = 5256 [pid 5256] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5255] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5255] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5255] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5255] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5255] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5256] <... rseq resumed>) = 0 [pid 5256] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5256] rt_sigprocmask(SIG_SETMASK, [], [pid 5255] <... mprotect resumed>) = 0 [pid 5256] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5255] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5255] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5256] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5257 attached [pid 5255] <... clone3 resumed> => {parent_tid=[5257]}, 88) = 5257 [pid 5255] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5255] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5257] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5255] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5257] set_robust_list(0x7f81bb19d9a0, 24 [pid 5256] <... memfd_create resumed>) = 3 [pid 5257] <... set_robust_list resumed>) = 0 [pid 5256] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5257] rt_sigprocmask(SIG_SETMASK, [], [pid 5256] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5257] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5257] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5256] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5257] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5257] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5255] <... futex resumed>) = 0 [pid 5256] <... write resumed>) = 262144 [pid 5256] munmap(0x7f81b2d7d000, 262144 [pid 5255] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5257] <... futex resumed>) = 0 [pid 5255] <... futex resumed>) = 1 [pid 5257] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5255] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5257] <... mount resumed>) = 0 [pid 5256] <... munmap resumed>) = 0 [pid 5256] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5257] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5256] <... openat resumed>) = 5 [pid 5256] ioctl(5, LOOP_SET_FD, 3 [pid 5255] <... futex resumed>) = 0 [pid 5257] <... futex resumed>) = 1 [pid 5255] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5257] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5255] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5257] <... open resumed>) = 6 [pid 5257] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5255] <... futex resumed>) = 0 [pid 5257] <... futex resumed>) = 1 [pid 5257] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5255] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5256] <... ioctl resumed>) = 0 [pid 5255] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5256] close(3) = 0 [pid 5256] mkdir("./file1", 0777) = 0 [pid 5256] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5257] <... write resumed>) = -1 EIO (Input/output error) [pid 5257] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5255] <... futex resumed>) = 0 [pid 5257] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5256] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5256] ioctl(5, LOOP_CLR_FD) = 0 [pid 5256] close(5) = 0 [pid 5256] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5255] exit_group(0 [pid 5256] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL) = ? [pid 5255] <... exit_group resumed>) = ? [pid 5257] <... futex resumed>) = ? [pid 5256] +++ exited with 0 +++ [pid 5257] +++ exited with 0 +++ [pid 5255] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5255, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./56", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./56", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./56/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./56/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./56/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./56/bus") = 0 umount2("./56/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./56/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./56/binderfs") = 0 umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./56/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./56/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./56/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./56/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./56") = 0 mkdir("./57", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5258 attached [pid 5258] set_robust_list(0x555556eda6a0, 24) = 0 [ 58.197553][ T5256] loop0: detected capacity change from 0 to 512 [ 58.202766][ T5257] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 58.214937][ T5257] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 58.227967][ T5256] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5258 [pid 5258] chdir("./57") = 0 [pid 5258] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5258] setpgid(0, 0) = 0 [pid 5258] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5258] write(3, "1000", 4) = 4 [pid 5258] close(3) = 0 [pid 5258] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5258] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5258] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5258] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5258] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5258] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5258] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5258] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5259 attached => {parent_tid=[5259]}, 88) = 5259 [pid 5259] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5259] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5259] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5259] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5258] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5258] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5258] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5259] <... futex resumed>) = 0 [pid 5258] <... futex resumed>) = 0 [pid 5258] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5258] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5259] memfd_create("syzkaller", 0 [pid 5258] <... mprotect resumed>) = 0 [pid 5258] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5259] <... memfd_create resumed>) = 3 [pid 5259] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5258] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5258] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5260 attached => {parent_tid=[5260]}, 88) = 5260 [pid 5260] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5260] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5258] rt_sigprocmask(SIG_SETMASK, [], [pid 5260] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5258] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5258] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5258] <... futex resumed>) = 0 [pid 5258] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5260] <... open resumed>) = 4 [pid 5259] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5260] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5258] <... futex resumed>) = 0 [pid 5260] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5258] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5258] <... futex resumed>) = 0 [pid 5260] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5258] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5260] <... mount resumed>) = 0 [pid 5260] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5258] <... futex resumed>) = 0 [pid 5260] <... futex resumed>) = 1 [pid 5260] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5258] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] <... open resumed>) = 5 [pid 5259] <... write resumed>) = 262144 [pid 5258] <... futex resumed>) = 0 [pid 5259] munmap(0x7f81b2d7d000, 262144 [pid 5260] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5259] <... munmap resumed>) = 0 [pid 5258] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5259] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5260] <... futex resumed>) = 0 [pid 5258] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5258] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5258] <... futex resumed>) = 0 [pid 5260] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5258] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5260] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5258] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5260] <... futex resumed>) = 0 [pid 5260] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5259] <... openat resumed>) = 6 [pid 5259] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5259] close(3) = 0 [pid 5259] mkdir("./file1", 0777) = 0 [ 58.299206][ T5259] loop0: detected capacity change from 0 to 512 [ 58.318352][ T5259] EXT4-fs (loop0): 1 orphan inode deleted [ 58.324215][ T5259] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 58.337293][ T5259] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/57/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5259] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5259] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5259] chdir("./file1") = 0 [pid 5259] ioctl(6, LOOP_CLR_FD) = 0 [pid 5259] close(6) = 0 [pid 5259] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5259] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5258] exit_group(0 [pid 5260] <... futex resumed>) = ? [pid 5259] <... futex resumed>) = ? [pid 5258] <... exit_group resumed>) = ? [pid 5259] +++ exited with 0 +++ [pid 5260] +++ exited with 0 +++ [pid 5258] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5258, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./57", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./57", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./57/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./57/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./57/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./57/bus") = 0 umount2("./57/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./57/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./57/binderfs") = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./57/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./57/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./57/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./57/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./57") = 0 mkdir("./58", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5263 ./strace-static-x86_64: Process 5263 attached [pid 5263] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5263] chdir("./58") = 0 [pid 5263] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5263] setpgid(0, 0) = 0 [pid 5263] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5263] write(3, "1000", 4) = 4 [pid 5263] close(3) = 0 [pid 5263] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5263] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5263] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5263] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5263] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5263] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5263] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5263] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5264]}, 88) = 5264 [pid 5263] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5263] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5263] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5263] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5263] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 5264 attached [pid 5264] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5264] set_robust_list(0x7f81bb1be9a0, 24 [pid 5263] <... mprotect resumed>) = 0 [pid 5264] <... set_robust_list resumed>) = 0 [pid 5264] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5263] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5264] memfd_create("syzkaller", 0 [pid 5263] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5264] <... memfd_create resumed>) = 3 [pid 5264] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 ./strace-static-x86_64: Process 5265 attached [pid 5263] <... clone3 resumed> => {parent_tid=[5265]}, 88) = 5265 [pid 5265] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5263] rt_sigprocmask(SIG_SETMASK, [], [pid 5265] set_robust_list(0x7f81bb19d9a0, 24 [pid 5263] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5265] <... set_robust_list resumed>) = 0 [pid 5263] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5265] rt_sigprocmask(SIG_SETMASK, [], [pid 5263] <... futex resumed>) = 0 [pid 5265] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5263] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5265] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5265] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5263] <... futex resumed>) = 0 [pid 5263] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5263] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5265] <... futex resumed>) = 1 [pid 5265] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5265] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5263] <... futex resumed>) = 0 [pid 5263] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5263] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5264] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5265] <... futex resumed>) = 1 [pid 5265] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5265] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5263] <... futex resumed>) = 0 [pid 5265] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5263] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5265] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5263] <... futex resumed>) = 0 [pid 5263] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5265] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5265] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5263] <... futex resumed>) = 0 [pid 5265] <... futex resumed>) = 1 [pid 5265] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5264] <... write resumed>) = 262144 [pid 5264] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5264] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [ 58.367956][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5264] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5264] close(3) = 0 [pid 5264] mkdir("./file1", 0777) = 0 [pid 5264] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5264] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5264] chdir("./file1") = 0 [pid 5264] ioctl(6, LOOP_CLR_FD) = 0 [pid 5264] close(6) = 0 [pid 5264] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5264] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5263] exit_group(0) = ? [pid 5265] <... futex resumed>) = ? [pid 5264] <... futex resumed>) = ? [pid 5264] +++ exited with 0 +++ [pid 5265] +++ exited with 0 +++ [pid 5263] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5263, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./58", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./58", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./58/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./58/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./58/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./58/bus") = 0 umount2("./58/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./58/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./58/binderfs") = 0 [ 58.419125][ T5264] loop0: detected capacity change from 0 to 512 [ 58.438127][ T5264] EXT4-fs (loop0): 1 orphan inode deleted [ 58.443941][ T5264] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 58.457148][ T5264] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/58/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./58/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./58/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./58/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./58/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./58") = 0 mkdir("./59", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5268 attached , child_tidptr=0x555556eda690) = 5268 [pid 5268] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5268] chdir("./59") = 0 [pid 5268] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5268] setpgid(0, 0) = 0 [pid 5268] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5268] write(3, "1000", 4) = 4 [pid 5268] close(3) = 0 [pid 5268] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5268] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5268] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5268] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5268] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5268] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5268] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5268] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5269 attached [pid 5269] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5268] <... clone3 resumed> => {parent_tid=[5269]}, 88) = 5269 [pid 5269] <... rseq resumed>) = 0 [pid 5268] rt_sigprocmask(SIG_SETMASK, [], [pid 5269] set_robust_list(0x7f81bb1be9a0, 24 [pid 5268] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5269] <... set_robust_list resumed>) = 0 [pid 5268] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5269] rt_sigprocmask(SIG_SETMASK, [], [pid 5268] <... futex resumed>) = 0 [pid 5269] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5268] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5269] memfd_create("syzkaller", 0 [pid 5268] <... futex resumed>) = 0 [pid 5269] <... memfd_create resumed>) = 3 [pid 5268] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5269] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5268] <... mmap resumed>) = 0x7f81bb17d000 [pid 5268] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5269] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5268] <... mprotect resumed>) = 0 [pid 5268] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5268] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5270 attached => {parent_tid=[5270]}, 88) = 5270 [pid 5270] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5268] rt_sigprocmask(SIG_SETMASK, [], [pid 5270] <... rseq resumed>) = 0 [pid 5269] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5268] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5270] set_robust_list(0x7f81bb19d9a0, 24 [pid 5268] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5270] <... set_robust_list resumed>) = 0 [pid 5270] rt_sigprocmask(SIG_SETMASK, [], [pid 5268] <... futex resumed>) = 0 [pid 5270] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5268] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5270] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5269] <... write resumed>) = 262144 [pid 5269] munmap(0x7f81b2d7d000, 262144 [pid 5270] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5269] <... munmap resumed>) = 0 [pid 5268] <... futex resumed>) = 0 [pid 5268] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5268] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5270] <... futex resumed>) = 1 [pid 5270] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5269] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5270] <... mount resumed>) = 0 [ 58.490103][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5270] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5269] <... openat resumed>) = 5 [pid 5268] <... futex resumed>) = 0 [pid 5269] ioctl(5, LOOP_SET_FD, 3 [pid 5268] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5270] <... futex resumed>) = 1 [pid 5270] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5268] <... futex resumed>) = 0 [pid 5268] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5270] <... open resumed>) = 6 [pid 5270] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5268] <... futex resumed>) = 0 [pid 5268] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5268] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5270] <... futex resumed>) = 1 [pid 5270] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5269] <... ioctl resumed>) = 0 [pid 5269] close(3) = 0 [pid 5269] mkdir("./file1", 0777) = 0 [pid 5269] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5270] <... write resumed>) = -1 EIO (Input/output error) [pid 5270] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5270] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5268] <... futex resumed>) = 0 [pid 5269] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5269] ioctl(5, LOOP_CLR_FD) = 0 [pid 5269] close(5) = 0 [pid 5269] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5268] exit_group(0) = ? [pid 5269] <... futex resumed>) = ? [pid 5269] +++ exited with 0 +++ [pid 5270] <... futex resumed>) = ? [pid 5270] +++ exited with 0 +++ [pid 5268] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5268, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./59", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./59", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./59/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./59/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./59/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./59/bus") = 0 umount2("./59/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./59/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./59/binderfs") = 0 umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./59/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./59/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./59/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./59/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./59") = 0 mkdir("./60", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5271 ./strace-static-x86_64: Process 5271 attached [pid 5271] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5271] chdir("./60") = 0 [pid 5271] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5271] setpgid(0, 0) = 0 [pid 5271] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5271] write(3, "1000", 4) = 4 [pid 5271] close(3) = 0 [pid 5271] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5271] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5271] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5271] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5271] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5271] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [ 58.534045][ T5269] loop0: detected capacity change from 0 to 512 [ 58.539197][ T5270] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 58.550724][ T5270] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 58.563476][ T5269] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5271] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5272 attached [pid 5272] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5271] <... clone3 resumed> => {parent_tid=[5272]}, 88) = 5272 [pid 5272] <... rseq resumed>) = 0 [pid 5271] rt_sigprocmask(SIG_SETMASK, [], [pid 5272] set_robust_list(0x7f81bb1be9a0, 24 [pid 5271] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5271] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5272] <... set_robust_list resumed>) = 0 [pid 5272] rt_sigprocmask(SIG_SETMASK, [], [pid 5271] <... futex resumed>) = 0 [pid 5271] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5272] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5271] <... futex resumed>) = 0 [pid 5272] memfd_create("syzkaller", 0 [pid 5271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5272] <... memfd_create resumed>) = 3 [pid 5271] <... mmap resumed>) = 0x7f81bb17d000 [pid 5272] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5271] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5272] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5271] <... mprotect resumed>) = 0 [pid 5271] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5271] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5273 attached [pid 5272] <... write resumed>) = 262144 [pid 5271] <... clone3 resumed> => {parent_tid=[5273]}, 88) = 5273 [pid 5273] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5271] rt_sigprocmask(SIG_SETMASK, [], [pid 5273] <... rseq resumed>) = 0 [pid 5271] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5272] munmap(0x7f81b2d7d000, 262144 [pid 5271] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5273] set_robust_list(0x7f81bb19d9a0, 24 [pid 5271] <... futex resumed>) = 0 [pid 5273] <... set_robust_list resumed>) = 0 [pid 5273] rt_sigprocmask(SIG_SETMASK, [], [pid 5271] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5273] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5273] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5272] <... munmap resumed>) = 0 [pid 5272] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5273] <... open resumed>) = 5 [pid 5272] <... openat resumed>) = 4 [pid 5273] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5271] <... futex resumed>) = 0 [pid 5272] ioctl(4, LOOP_SET_FD, 3 [pid 5271] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5273] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5271] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5273] <... mount resumed>) = 0 [pid 5273] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5273] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5271] <... futex resumed>) = 0 [pid 5271] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5273] <... futex resumed>) = 0 [pid 5273] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5273] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5273] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5271] <... futex resumed>) = 1 [pid 5271] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5271] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5273] <... futex resumed>) = 0 [pid 5273] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5271] <... futex resumed>) = 1 [pid 5271] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5272] <... ioctl resumed>) = 0 [pid 5272] close(3) = 0 [pid 5272] mkdir("./file1", 0777) = 0 [pid 5272] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5273] <... write resumed>) = 262144 [pid 5273] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5271] <... futex resumed>) = 0 [pid 5273] <... futex resumed>) = 1 [pid 5273] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5272] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5272] ioctl(4, LOOP_CLR_FD) = 0 [pid 5272] close(4) = 0 [pid 5272] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5272] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5271] exit_group(0 [pid 5273] <... futex resumed>) = ? [pid 5272] <... futex resumed>) = ? [pid 5273] +++ exited with 0 +++ [pid 5272] +++ exited with 0 +++ [pid 5271] <... exit_group resumed>) = ? [pid 5271] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5271, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./60", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./60", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./60/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./60/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./60/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./60/bus") = 0 umount2("./60/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./60/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./60/binderfs") = 0 umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./60/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./60/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./60/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./60/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./60") = 0 mkdir("./61", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5274 ./strace-static-x86_64: Process 5274 attached [pid 5274] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5274] chdir("./61") = 0 [pid 5274] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5274] setpgid(0, 0) = 0 [pid 5274] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5274] write(3, "1000", 4) = 4 [pid 5274] close(3) = 0 [pid 5274] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5274] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5274] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5274] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5274] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5274] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5274] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5274] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5275 attached => {parent_tid=[5275]}, 88) = 5275 [pid 5274] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5274] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 58.630727][ T5272] loop0: detected capacity change from 0 to 512 [ 58.645741][ T5272] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5274] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5275] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5274] <... futex resumed>) = 0 [pid 5275] <... rseq resumed>) = 0 [pid 5274] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5275] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5275] rt_sigprocmask(SIG_SETMASK, [], [pid 5274] <... mmap resumed>) = 0x7f81bb17d000 [pid 5275] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5275] memfd_create("syzkaller", 0 [pid 5274] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5275] <... memfd_create resumed>) = 3 [pid 5275] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5274] <... mprotect resumed>) = 0 [pid 5274] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5274] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5276 attached => {parent_tid=[5276]}, 88) = 5276 [pid 5274] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5274] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5276] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5274] <... futex resumed>) = 0 [pid 5274] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5276] <... rseq resumed>) = 0 [pid 5275] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5276] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5276] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5276] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5276] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5274] <... futex resumed>) = 0 [pid 5276] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5274] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5276] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5274] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5275] <... write resumed>) = 262144 [pid 5275] munmap(0x7f81b2d7d000, 262144 [pid 5276] <... mount resumed>) = 0 [pid 5276] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5274] <... futex resumed>) = 0 [pid 5276] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5274] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5275] <... munmap resumed>) = 0 [pid 5274] <... futex resumed>) = 0 [pid 5275] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5274] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5276] <... open resumed>) = 6 [pid 5275] <... openat resumed>) = 5 [pid 5276] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5275] ioctl(5, LOOP_SET_FD, 3 [pid 5276] <... futex resumed>) = 1 [pid 5274] <... futex resumed>) = 0 [pid 5276] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5274] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5276] <... futex resumed>) = 0 [pid 5276] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5275] <... ioctl resumed>) = 0 [pid 5274] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5275] close(3) = 0 [pid 5275] mkdir("./file1", 0777) = 0 [pid 5275] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5276] <... write resumed>) = -1 EIO (Input/output error) [pid 5276] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5274] <... futex resumed>) = 0 [pid 5276] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5275] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5275] ioctl(5, LOOP_CLR_FD) = 0 [pid 5275] close(5) = 0 [pid 5275] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5275] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5274] exit_group(0 [pid 5275] <... futex resumed>) = ? [pid 5274] <... exit_group resumed>) = ? [pid 5275] +++ exited with 0 +++ [pid 5276] <... futex resumed>) = ? [pid 5276] +++ exited with 0 +++ [pid 5274] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5274, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./61", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./61", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./61/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./61/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./61/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./61/bus") = 0 umount2("./61/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./61/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./61/binderfs") = 0 umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./61/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./61/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./61/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./61/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./61") = 0 mkdir("./62", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [ 58.708667][ T5275] loop0: detected capacity change from 0 to 512 [ 58.712830][ T5276] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 58.726346][ T5276] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 58.739908][ T5275] EXT4-fs (loop0): VFS: Can't find ext4 filesystem close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5277 attached , child_tidptr=0x555556eda690) = 5277 [pid 5277] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5277] chdir("./62") = 0 [pid 5277] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5277] setpgid(0, 0) = 0 [pid 5277] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5277] write(3, "1000", 4) = 4 [pid 5277] close(3) = 0 [pid 5277] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5277] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5277] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5277] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5277] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5277] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5277] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5278 attached [pid 5278] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5277] <... clone3 resumed> => {parent_tid=[5278]}, 88) = 5278 [pid 5278] <... rseq resumed>) = 0 [pid 5278] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5277] rt_sigprocmask(SIG_SETMASK, [], [pid 5278] rt_sigprocmask(SIG_SETMASK, [], [pid 5277] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5278] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5277] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5278] memfd_create("syzkaller", 0 [pid 5277] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5278] <... memfd_create resumed>) = 3 [pid 5278] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5277] <... futex resumed>) = 0 [pid 5277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5278] <... mmap resumed>) = 0x7f81b2d9e000 [pid 5277] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5277] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5277] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5278] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5277] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5277] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0} => {parent_tid=[5279]}, 88) = 5279 [pid 5277] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5277] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5277] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5279 attached [pid 5279] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053) = 0 [pid 5278] <... write resumed>) = 262144 [pid 5279] set_robust_list(0x7f81b2d9d9a0, 24 [pid 5278] munmap(0x7f81b2d9e000, 262144 [pid 5279] <... set_robust_list resumed>) = 0 [pid 5279] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5278] <... munmap resumed>) = 0 [pid 5279] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5278] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5278] ioctl(5, LOOP_SET_FD, 3 [pid 5279] <... open resumed>) = 4 [pid 5279] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5277] <... futex resumed>) = 0 [pid 5277] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5277] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5279] <... futex resumed>) = 1 [pid 5279] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5279] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5277] <... futex resumed>) = 0 [pid 5279] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5277] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5279] <... open resumed>) = 6 [pid 5277] <... futex resumed>) = 0 [pid 5277] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5279] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5277] <... futex resumed>) = 0 [pid 5279] <... futex resumed>) = 1 [pid 5277] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5279] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5277] <... futex resumed>) = 0 [pid 5277] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5278] <... ioctl resumed>) = 0 [pid 5278] close(3) = 0 [pid 5278] mkdir("./file1", 0777) = 0 [pid 5278] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5279] <... write resumed>) = 262144 [pid 5279] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5277] <... futex resumed>) = 0 [pid 5279] <... futex resumed>) = 1 [pid 5279] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5278] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5278] ioctl(5, LOOP_CLR_FD) = 0 [pid 5278] close(5) = 0 [pid 5278] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5278] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5277] exit_group(0) = ? [pid 5278] <... futex resumed>) = ? [pid 5278] +++ exited with 0 +++ [pid 5279] <... futex resumed>) = ? [pid 5279] +++ exited with 0 +++ [pid 5277] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5277, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./62", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./62", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./62/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./62/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./62/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./62/bus") = 0 umount2("./62/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./62/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./62/binderfs") = 0 umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./62/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./62/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./62/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./62/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./62") = 0 mkdir("./63", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5280 attached , child_tidptr=0x555556eda690) = 5280 [pid 5280] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5280] chdir("./63") = 0 [pid 5280] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5280] setpgid(0, 0) = 0 [pid 5280] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5280] write(3, "1000", 4) = 4 [pid 5280] close(3) = 0 [pid 5280] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5280] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5280] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5280] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5280] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5280] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5280] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [ 58.810216][ T5278] loop0: detected capacity change from 0 to 512 [ 58.823874][ T5278] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5280] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5281]}, 88) = 5281 ./strace-static-x86_64: Process 5281 attached [pid 5281] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5281] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5281] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5280] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5281] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5280] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5281] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5280] <... futex resumed>) = 0 [pid 5281] memfd_create("syzkaller", 0 [pid 5280] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5280] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5281] <... memfd_create resumed>) = 3 [pid 5280] <... mmap resumed>) = 0x7f81bb17d000 [pid 5281] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5280] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5281] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5280] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5281] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5280] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5280] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5282 attached [pid 5282] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5280] <... clone3 resumed> => {parent_tid=[5282]}, 88) = 5282 [pid 5282] <... rseq resumed>) = 0 [pid 5280] rt_sigprocmask(SIG_SETMASK, [], [pid 5282] set_robust_list(0x7f81bb19d9a0, 24 [pid 5280] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5282] <... set_robust_list resumed>) = 0 [pid 5280] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5282] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5281] <... write resumed>) = 262144 [pid 5280] <... futex resumed>) = 0 [pid 5281] munmap(0x7f81b2d7d000, 262144 [pid 5282] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5280] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5281] <... munmap resumed>) = 0 [pid 5281] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5282] <... open resumed>) = 4 [pid 5281] <... openat resumed>) = 5 [pid 5281] ioctl(5, LOOP_SET_FD, 3 [pid 5282] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5281] <... ioctl resumed>) = 0 [pid 5281] close(3) = 0 [pid 5281] mkdir("./file1", 0777 [pid 5282] <... futex resumed>) = 1 [pid 5280] <... futex resumed>) = 0 [pid 5280] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5282] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5280] <... futex resumed>) = 0 [pid 5280] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5282] <... mount resumed>) = 0 [pid 5282] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5280] <... futex resumed>) = 0 [pid 5282] <... futex resumed>) = 1 [pid 5280] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5282] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5280] <... futex resumed>) = 0 [pid 5282] <... open resumed>) = 3 [pid 5280] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5281] <... mkdir resumed>) = 0 [pid 5281] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5282] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5280] <... futex resumed>) = 0 [pid 5282] <... futex resumed>) = 1 [pid 5280] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5282] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5280] <... futex resumed>) = 0 [pid 5280] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5282] <... write resumed>) = 262144 [pid 5282] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5280] <... futex resumed>) = 0 [pid 5282] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5281] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5281] ioctl(5, LOOP_CLR_FD) = 0 [pid 5281] close(5) = 0 [pid 5281] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5281] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5280] exit_group(0 [pid 5282] <... futex resumed>) = ? [pid 5281] <... futex resumed>) = ? [pid 5280] <... exit_group resumed>) = ? [pid 5282] +++ exited with 0 +++ [pid 5281] +++ exited with 0 +++ [pid 5280] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5280, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./63", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./63", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./63/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./63/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./63/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./63/bus") = 0 umount2("./63/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./63/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./63/binderfs") = 0 umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./63/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./63/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./63/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./63/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./63") = 0 mkdir("./64", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5283 ./strace-static-x86_64: Process 5283 attached [ 58.883986][ T5281] loop0: detected capacity change from 0 to 512 [ 58.899138][ T5281] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5283] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5283] chdir("./64") = 0 [pid 5283] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5283] setpgid(0, 0) = 0 [pid 5283] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5283] write(3, "1000", 4) = 4 [pid 5283] close(3) = 0 [pid 5283] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5283] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5283] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5283] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5283] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5283] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5283] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5283] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5284 attached [pid 5284] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5284] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5284] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5284] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5283] <... clone3 resumed> => {parent_tid=[5284]}, 88) = 5284 [pid 5283] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5283] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5284] <... futex resumed>) = 0 [pid 5283] <... futex resumed>) = 1 [pid 5284] memfd_create("syzkaller", 0) = 3 [pid 5283] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5283] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5283] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5283] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5283] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5285 attached [pid 5284] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5285] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5284] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5285] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5285] rt_sigprocmask(SIG_SETMASK, [], [pid 5283] <... clone3 resumed> => {parent_tid=[5285]}, 88) = 5285 [pid 5285] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5285] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5283] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5283] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5285] <... futex resumed>) = 0 [pid 5283] <... futex resumed>) = 1 [pid 5285] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5283] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5284] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5285] <... open resumed>) = 4 [pid 5285] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5283] <... futex resumed>) = 0 [pid 5285] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5283] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5285] <... mount resumed>) = 0 [pid 5284] <... write resumed>) = 262144 [pid 5283] <... futex resumed>) = 0 [pid 5284] munmap(0x7f81b2d7d000, 262144 [pid 5283] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5285] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5283] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5285] <... futex resumed>) = 0 [pid 5283] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5285] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5284] <... munmap resumed>) = 0 [pid 5283] <... futex resumed>) = 0 [pid 5284] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5285] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5284] <... openat resumed>) = 6 [pid 5283] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5285] <... futex resumed>) = 0 [pid 5283] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5285] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5283] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5284] ioctl(6, LOOP_SET_FD, 3 [pid 5285] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5284] <... ioctl resumed>) = 0 [pid 5283] <... futex resumed>) = 0 [pid 5285] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5283] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5284] close(3) = 0 [pid 5284] mkdir("./file1", 0777) = 0 [pid 5284] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5285] <... write resumed>) = 262144 [pid 5285] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5283] <... futex resumed>) = 0 [pid 5285] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5284] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5284] ioctl(6, LOOP_CLR_FD) = 0 [pid 5284] close(6) = 0 [pid 5284] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5284] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5283] exit_group(0 [pid 5285] <... futex resumed>) = ? [pid 5284] <... futex resumed>) = ? [pid 5283] <... exit_group resumed>) = ? [pid 5285] +++ exited with 0 +++ [pid 5284] +++ exited with 0 +++ [pid 5283] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5283, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./64", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./64/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./64/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./64/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./64/bus") = 0 umount2("./64/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./64/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./64/binderfs") = 0 umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./64/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./64/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./64/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./64/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./64") = 0 mkdir("./65", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5286 attached , child_tidptr=0x555556eda690) = 5286 [pid 5286] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5286] chdir("./65") = 0 [pid 5286] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5286] setpgid(0, 0) = 0 [pid 5286] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5286] write(3, "1000", 4) = 4 [pid 5286] close(3) = 0 [pid 5286] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5286] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5286] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5286] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [ 58.965240][ T5284] loop0: detected capacity change from 0 to 512 [ 58.978698][ T5284] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5286] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5286] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5286] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5287 attached => {parent_tid=[5287]}, 88) = 5287 [pid 5287] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5287] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5287] rt_sigprocmask(SIG_SETMASK, [], [pid 5286] rt_sigprocmask(SIG_SETMASK, [], [pid 5287] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5287] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5286] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5286] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5287] <... futex resumed>) = 0 [pid 5286] <... futex resumed>) = 1 [pid 5287] memfd_create("syzkaller", 0 [pid 5286] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5287] <... memfd_create resumed>) = 3 [pid 5286] <... futex resumed>) = 0 [pid 5287] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81b2d7d000 [pid 5286] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5286] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5286] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0}./strace-static-x86_64: Process 5288 attached [pid 5288] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053) = 0 [pid 5286] <... clone3 resumed> => {parent_tid=[5288]}, 88) = 5288 [pid 5288] set_robust_list(0x7f81b2d9d9a0, 24 [pid 5286] rt_sigprocmask(SIG_SETMASK, [], [pid 5288] <... set_robust_list resumed>) = 0 [pid 5288] rt_sigprocmask(SIG_SETMASK, [], [pid 5287] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5286] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5288] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5286] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5288] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5286] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5288] <... open resumed>) = 4 [pid 5287] <... write resumed>) = 262144 [pid 5287] munmap(0x7f81b2d9e000, 262144 [pid 5288] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5286] <... futex resumed>) = 0 [pid 5288] <... futex resumed>) = 1 [pid 5286] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5288] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5286] <... futex resumed>) = 0 [pid 5287] <... munmap resumed>) = 0 [pid 5286] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5287] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5288] <... mount resumed>) = 0 [pid 5287] ioctl(5, LOOP_SET_FD, 3 [pid 5288] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5286] <... futex resumed>) = 0 [pid 5288] <... futex resumed>) = 1 [pid 5286] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5288] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5286] <... futex resumed>) = 0 [pid 5286] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5287] <... ioctl resumed>) = 0 [pid 5287] close(3 [pid 5288] <... open resumed>) = 6 [pid 5287] <... close resumed>) = 0 [pid 5287] mkdir("./file1", 0777 [pid 5288] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5286] <... futex resumed>) = 0 [pid 5288] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5286] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5288] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5286] <... futex resumed>) = 0 [pid 5288] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5286] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5287] <... mkdir resumed>) = 0 [pid 5287] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5288] <... write resumed>) = 262144 [pid 5288] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5286] <... futex resumed>) = 0 [pid 5288] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5287] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5287] ioctl(5, LOOP_CLR_FD) = 0 [pid 5287] close(5) = 0 [pid 5287] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5287] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5286] exit_group(0) = ? [pid 5287] <... futex resumed>) = ? [pid 5287] +++ exited with 0 +++ [pid 5288] <... futex resumed>) = ? [pid 5288] +++ exited with 0 +++ [pid 5286] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5286, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./65", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./65", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./65/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./65/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./65/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./65/bus") = 0 umount2("./65/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./65/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./65/binderfs") = 0 umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./65/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./65/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./65/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./65/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./65") = 0 mkdir("./66", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5289 attached , child_tidptr=0x555556eda690) = 5289 [pid 5289] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5289] chdir("./66") = 0 [pid 5289] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5289] setpgid(0, 0) = 0 [pid 5289] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5289] write(3, "1000", 4) = 4 [ 59.043065][ T5287] loop0: detected capacity change from 0 to 512 [ 59.068904][ T5287] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5289] close(3) = 0 [pid 5289] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5289] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5289] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5289] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5289] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5289] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5290 attached [pid 5290] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5289] <... clone3 resumed> => {parent_tid=[5290]}, 88) = 5290 [pid 5290] <... rseq resumed>) = 0 [pid 5289] rt_sigprocmask(SIG_SETMASK, [], [pid 5290] set_robust_list(0x7f81bb1be9a0, 24 [pid 5289] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5290] <... set_robust_list resumed>) = 0 [pid 5289] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5290] rt_sigprocmask(SIG_SETMASK, [], [pid 5289] <... futex resumed>) = 0 [pid 5290] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5289] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5290] memfd_create("syzkaller", 0 [pid 5289] <... futex resumed>) = 0 [pid 5290] <... memfd_create resumed>) = 3 [pid 5289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5290] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5289] <... mmap resumed>) = 0x7f81bb17d000 [pid 5290] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5289] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5289] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5289] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5291 attached [pid 5291] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5289] <... clone3 resumed> => {parent_tid=[5291]}, 88) = 5291 [pid 5291] <... rseq resumed>) = 0 [pid 5289] rt_sigprocmask(SIG_SETMASK, [], [pid 5291] set_robust_list(0x7f81bb19d9a0, 24 [pid 5289] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5291] <... set_robust_list resumed>) = 0 [pid 5289] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5291] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5289] <... futex resumed>) = 0 [pid 5291] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5289] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5291] <... open resumed>) = 4 [pid 5290] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5291] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5289] <... futex resumed>) = 0 [pid 5289] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5291] <... futex resumed>) = 1 [pid 5291] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5291] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5289] <... futex resumed>) = 0 [pid 5289] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5291] <... futex resumed>) = 1 [pid 5291] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5291] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5289] <... futex resumed>) = 0 [pid 5289] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5291] <... futex resumed>) = 1 [pid 5291] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5290] <... write resumed>) = 262144 [pid 5290] munmap(0x7f81b2d7d000, 262144 [pid 5291] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5289] <... futex resumed>) = 0 [pid 5291] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5290] <... munmap resumed>) = 0 [pid 5290] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5290] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5290] close(3) = 0 [pid 5290] mkdir("./file1", 0777) = 0 [pid 5290] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5290] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5290] chdir("./file1") = 0 [pid 5290] ioctl(6, LOOP_CLR_FD) = 0 [pid 5290] close(6) = 0 [pid 5290] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5290] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5289] exit_group(0) = ? [pid 5291] <... futex resumed>) = ? [pid 5290] <... futex resumed>) = ? [pid 5291] +++ exited with 0 +++ [pid 5290] +++ exited with 0 +++ [pid 5289] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5289, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./66", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./66", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./66/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 59.139220][ T5290] loop0: detected capacity change from 0 to 512 [ 59.158190][ T5290] EXT4-fs (loop0): 1 orphan inode deleted [ 59.163983][ T5290] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 59.177192][ T5290] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/66/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./66/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./66/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./66/bus") = 0 umount2("./66/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./66/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./66/binderfs") = 0 umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./66/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./66/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./66/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./66/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./66") = 0 mkdir("./67", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5294 attached [pid 5294] set_robust_list(0x555556eda6a0, 24 [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5294 [pid 5294] <... set_robust_list resumed>) = 0 [pid 5294] chdir("./67") = 0 [pid 5294] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5294] setpgid(0, 0) = 0 [pid 5294] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5294] write(3, "1000", 4) = 4 [pid 5294] close(3) = 0 [pid 5294] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5294] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5294] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5294] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5294] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5294] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5294] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5294] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5295 attached [pid 5295] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5294] <... clone3 resumed> => {parent_tid=[5295]}, 88) = 5295 [pid 5295] <... rseq resumed>) = 0 [pid 5294] rt_sigprocmask(SIG_SETMASK, [], [pid 5295] set_robust_list(0x7f81bb1be9a0, 24 [pid 5294] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5295] <... set_robust_list resumed>) = 0 [pid 5294] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5295] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5294] <... futex resumed>) = 0 [pid 5295] memfd_create("syzkaller", 0 [pid 5294] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5294] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5295] <... memfd_create resumed>) = 3 [pid 5294] <... mmap resumed>) = 0x7f81bb17d000 [pid 5294] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5295] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5294] <... mprotect resumed>) = 0 [pid 5295] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5294] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5294] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5296 attached => {parent_tid=[5296]}, 88) = 5296 [pid 5294] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5294] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5294] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5296] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5296] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5296] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5296] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5296] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5294] <... futex resumed>) = 0 [pid 5294] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5296] <... futex resumed>) = 1 [pid 5294] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5296] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5295] <... write resumed>) = 262144 [pid 5295] munmap(0x7f81b2d7d000, 262144 [pid 5296] <... mount resumed>) = 0 [pid 5295] <... munmap resumed>) = 0 [pid 5295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5295] ioctl(5, LOOP_SET_FD, 3 [pid 5296] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5294] <... futex resumed>) = 0 [pid 5296] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [ 59.208684][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5294] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5296] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5294] <... futex resumed>) = 0 [pid 5296] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5296] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5296] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5294] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5294] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5296] <... futex resumed>) = 0 [pid 5296] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5294] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5295] <... ioctl resumed>) = 0 [pid 5295] close(3) = 0 [pid 5295] mkdir("./file1", 0777) = 0 [pid 5295] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5296] <... write resumed>) = 262144 [pid 5296] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5294] <... futex resumed>) = 0 [pid 5296] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5295] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5295] ioctl(5, LOOP_CLR_FD) = 0 [pid 5295] close(5) = 0 [pid 5295] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5294] exit_group(0 [pid 5296] <... futex resumed>) = ? [pid 5294] <... exit_group resumed>) = ? [pid 5296] +++ exited with 0 +++ [pid 5295] +++ exited with 0 +++ [pid 5294] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5294, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./67", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./67", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./67/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./67/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./67/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./67/bus") = 0 umount2("./67/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./67/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./67/binderfs") = 0 umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./67/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./67/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./67/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./67/file1") = 0 [ 59.250211][ T5295] loop0: detected capacity change from 0 to 512 [ 59.265747][ T5295] EXT4-fs (loop0): VFS: Can't find ext4 filesystem getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./67") = 0 mkdir("./68", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5297 ./strace-static-x86_64: Process 5297 attached [pid 5297] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5297] chdir("./68") = 0 [pid 5297] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5297] setpgid(0, 0) = 0 [pid 5297] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5297] write(3, "1000", 4) = 4 [pid 5297] close(3) = 0 [pid 5297] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5297] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5297] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5297] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5297] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5297] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5297] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5297] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5298 attached => {parent_tid=[5298]}, 88) = 5298 [pid 5298] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5298] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5298] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5298] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5297] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5297] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5298] <... futex resumed>) = 0 [pid 5297] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5298] memfd_create("syzkaller", 0) = 3 [pid 5298] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5297] <... futex resumed>) = 0 [pid 5297] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81b2d7d000 [pid 5297] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5298] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5297] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5297] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0} => {parent_tid=[5299]}, 88) = 5299 [pid 5297] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5299 attached NULL, 8) = 0 [pid 5299] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053) = 0 [pid 5299] set_robust_list(0x7f81b2d9d9a0, 24) = 0 [pid 5298] <... write resumed>) = 262144 [pid 5297] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5299] rt_sigprocmask(SIG_SETMASK, [], [pid 5298] munmap(0x7f81b2d9e000, 262144 [pid 5297] <... futex resumed>) = 0 [pid 5299] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5299] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5297] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5298] <... munmap resumed>) = 0 [pid 5299] <... open resumed>) = 4 [pid 5299] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5299] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5297] <... futex resumed>) = 0 [pid 5298] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5297] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5299] <... futex resumed>) = 0 [pid 5297] <... futex resumed>) = 1 [pid 5299] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5299] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5299] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5298] <... openat resumed>) = 5 [pid 5297] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5298] ioctl(5, LOOP_SET_FD, 3 [pid 5297] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5299] <... futex resumed>) = 0 [pid 5299] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5299] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5299] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5298] <... ioctl resumed>) = 0 [pid 5297] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5298] close(3 [pid 5297] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5298] <... close resumed>) = 0 [pid 5297] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5299] <... futex resumed>) = 0 [pid 5298] mkdir("./file1", 0777 [pid 5297] <... futex resumed>) = 1 [pid 5299] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5297] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5298] <... mkdir resumed>) = 0 [pid 5298] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5299] <... write resumed>) = 262144 [pid 5299] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5297] <... futex resumed>) = 0 [pid 5299] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5298] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5298] ioctl(5, LOOP_CLR_FD) = 0 [pid 5298] close(5) = 0 [pid 5298] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5298] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5297] exit_group(0 [pid 5299] <... futex resumed>) = ? [pid 5297] <... exit_group resumed>) = ? [pid 5299] +++ exited with 0 +++ [pid 5298] <... futex resumed>) = ? [pid 5298] +++ exited with 0 +++ [pid 5297] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5297, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./68", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./68", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./68/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./68/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./68/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./68/bus") = 0 umount2("./68/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./68/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./68/binderfs") = 0 umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./68/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./68/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./68/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./68/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./68") = 0 mkdir("./69", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 59.342449][ T5298] loop0: detected capacity change from 0 to 512 [ 59.358258][ T5298] EXT4-fs (loop0): VFS: Can't find ext4 filesystem ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5300 attached , child_tidptr=0x555556eda690) = 5300 [pid 5300] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5300] chdir("./69") = 0 [pid 5300] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5300] setpgid(0, 0) = 0 [pid 5300] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5300] write(3, "1000", 4) = 4 [pid 5300] close(3) = 0 [pid 5300] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5300] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5300] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5300] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5300] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5300] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5300] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5300] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5301 attached => {parent_tid=[5301]}, 88) = 5301 [pid 5301] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5301] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5301] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5301] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5300] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5300] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5301] <... futex resumed>) = 0 [pid 5301] memfd_create("syzkaller", 0 [pid 5300] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5301] <... memfd_create resumed>) = 3 [pid 5301] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5300] <... futex resumed>) = 0 [pid 5300] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81b2d7d000 [pid 5300] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5300] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5300] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0}./strace-static-x86_64: Process 5302 attached => {parent_tid=[5302]}, 88) = 5302 [pid 5302] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053) = 0 [pid 5302] set_robust_list(0x7f81b2d9d9a0, 24) = 0 [pid 5302] rt_sigprocmask(SIG_SETMASK, [], [pid 5300] rt_sigprocmask(SIG_SETMASK, [], [pid 5302] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5302] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5300] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5300] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5302] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5302] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5300] <... futex resumed>) = 0 [pid 5301] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5302] <... open resumed>) = 4 [pid 5301] <... write resumed>) = 262144 [pid 5300] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5301] munmap(0x7f81b2d9e000, 262144) = 0 [pid 5301] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5301] ioctl(5, LOOP_SET_FD, 3 [pid 5302] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5300] <... futex resumed>) = 0 [pid 5302] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5300] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5302] <... mount resumed>) = 0 [pid 5300] <... futex resumed>) = 0 [pid 5300] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5302] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5300] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5302] <... futex resumed>) = 0 [pid 5300] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5302] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5300] <... futex resumed>) = 0 [pid 5302] <... open resumed>) = 6 [pid 5300] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5302] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5300] <... futex resumed>) = 0 [pid 5302] <... futex resumed>) = 1 [pid 5300] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5302] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5300] <... futex resumed>) = 0 [pid 5300] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5302] <... write resumed>) = 262144 [pid 5301] <... ioctl resumed>) = 0 [pid 5301] close(3) = 0 [pid 5301] mkdir("./file1", 0777 [pid 5302] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5300] <... futex resumed>) = 0 [pid 5302] <... futex resumed>) = 1 [pid 5302] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5301] <... mkdir resumed>) = 0 [pid 5301] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = -1 EINVAL (Invalid argument) [pid 5301] ioctl(5, LOOP_CLR_FD) = 0 [pid 5301] close(5) = 0 [pid 5301] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5301] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5300] exit_group(0 [pid 5302] <... futex resumed>) = ? [pid 5301] <... futex resumed>) = ? [pid 5300] <... exit_group resumed>) = ? [pid 5302] +++ exited with 0 +++ [pid 5301] +++ exited with 0 +++ [pid 5300] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5300, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./69", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./69", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./69/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./69/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./69/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./69/bus") = 0 umount2("./69/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./69/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./69/binderfs") = 0 umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./69/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./69/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./69/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./69/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./69") = 0 mkdir("./70", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5303 attached , child_tidptr=0x555556eda690) = 5303 [pid 5303] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5303] chdir("./70") = 0 [pid 5303] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5303] setpgid(0, 0) = 0 [pid 5303] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5303] write(3, "1000", 4) = 4 [pid 5303] close(3) = 0 [pid 5303] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5303] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5303] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5303] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5303] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5303] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5303] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5303] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5304 attached => {parent_tid=[5304]}, 88) = 5304 [pid 5303] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5303] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5303] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5303] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5303] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5303] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5303] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5305 attached [pid 5304] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5305] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5303] <... clone3 resumed> => {parent_tid=[5305]}, 88) = 5305 [pid 5305] <... rseq resumed>) = 0 [pid 5304] <... rseq resumed>) = 0 [pid 5303] rt_sigprocmask(SIG_SETMASK, [], [pid 5305] set_robust_list(0x7f81bb19d9a0, 24 [pid 5304] set_robust_list(0x7f81bb1be9a0, 24 [pid 5303] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5304] <... set_robust_list resumed>) = 0 [pid 5303] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5304] rt_sigprocmask(SIG_SETMASK, [], [pid 5303] <... futex resumed>) = 0 [pid 5304] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5303] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5305] <... set_robust_list resumed>) = 0 [pid 5305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5304] memfd_create("syzkaller", 0 [pid 5305] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5304] <... memfd_create resumed>) = 3 [pid 5304] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5305] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5303] <... futex resumed>) = 0 [pid 5304] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5303] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5303] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5305] <... futex resumed>) = 1 [pid 5305] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5305] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5303] <... futex resumed>) = 0 [pid 5303] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5303] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5305] <... futex resumed>) = 1 [pid 5305] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5305] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5304] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5303] <... futex resumed>) = 0 [pid 5303] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5303] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5305] <... futex resumed>) = 1 [pid 5305] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5305] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5303] <... futex resumed>) = 0 [pid 5305] <... futex resumed>) = 1 [pid 5305] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5304] <... write resumed>) = 262144 [pid 5304] munmap(0x7f81b2d7d000, 262144) = 0 [ 59.431210][ T5301] loop0: detected capacity change from 0 to 512 [ 59.455801][ T5301] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5304] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5304] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5304] close(3) = 0 [pid 5304] mkdir("./file1", 0777) = 0 [ 59.500357][ T5304] loop0: detected capacity change from 0 to 512 [ 59.522346][ T5304] EXT4-fs (loop0): 1 orphan inode deleted [ 59.528363][ T5304] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5304] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5304] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5304] chdir("./file1") = 0 [pid 5304] ioctl(6, LOOP_CLR_FD) = 0 [pid 5304] close(6) = 0 [pid 5304] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5304] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5303] exit_group(0 [pid 5304] <... futex resumed>) = ? [pid 5303] <... exit_group resumed>) = ? [pid 5304] +++ exited with 0 +++ [pid 5305] <... futex resumed>) = ? [pid 5305] +++ exited with 0 +++ [pid 5303] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5303, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./70", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./70", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./70/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./70/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./70/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./70/bus") = 0 umount2("./70/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./70/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./70/binderfs") = 0 [ 59.541183][ T5304] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/70/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./70/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./70/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./70/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./70/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./70") = 0 mkdir("./71", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5308 attached [pid 5308] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5308] chdir("./71") = 0 [pid 5308] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5308] setpgid(0, 0) = 0 [pid 5308] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5308] write(3, "1000", 4) = 4 [pid 5308] close(3) = 0 [pid 5308] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5308] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5308] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5308] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5308] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5308] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5308] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5308] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5309]}, 88) = 5309 [pid 5308] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5308] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5308] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5308] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5308] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 ./strace-static-x86_64: Process 5309 attached [pid 5309] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5309] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5308] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5309] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5309] memfd_create("syzkaller", 0 [pid 5308] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5308] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5310]}, 88) = 5310 [pid 5309] <... memfd_create resumed>) = 3 [pid 5308] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5308] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5309] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5308] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5309] <... mmap resumed>) = 0x7f81b2d7d000 ./strace-static-x86_64: Process 5310 attached [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5308 [pid 5310] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5310] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5310] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5310] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5310] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5310] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5309] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5308] <... futex resumed>) = 0 [pid 5308] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5310] <... futex resumed>) = 0 [pid 5310] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5308] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5310] <... mount resumed>) = 0 [pid 5310] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5308] <... futex resumed>) = 0 [pid 5310] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5308] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5310] <... futex resumed>) = 0 [pid 5308] <... futex resumed>) = 1 [pid 5310] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5308] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5310] <... open resumed>) = 5 [pid 5310] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5308] <... futex resumed>) = 0 [pid 5310] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5308] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5310] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5308] <... futex resumed>) = 0 [pid 5310] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5308] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5310] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5309] <... write resumed>) = 262144 [pid 5309] munmap(0x7f81b2d7d000, 262144) = 0 [ 59.571272][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5309] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5309] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5309] close(3) = 0 [pid 5309] mkdir("./file1", 0777) = 0 [pid 5309] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5309] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5309] chdir("./file1") = 0 [pid 5309] ioctl(6, LOOP_CLR_FD) = 0 [pid 5309] close(6) = 0 [pid 5309] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5308] exit_group(0 [pid 5309] <... futex resumed>) = 0 [pid 5308] <... exit_group resumed>) = ? [pid 5310] <... futex resumed>) = ? [pid 5309] +++ exited with 0 +++ [pid 5310] +++ exited with 0 +++ [pid 5308] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5308, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./71", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./71", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./71/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./71/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./71/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./71/bus") = 0 umount2("./71/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./71/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 59.621661][ T5309] loop0: detected capacity change from 0 to 512 [ 59.638068][ T5309] EXT4-fs (loop0): 1 orphan inode deleted [ 59.644000][ T5309] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [ 59.656695][ T5309] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/71/file1 supports timestamps until 2038-01-19 (0x7fffffff) unlink("./71/binderfs") = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./71/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./71/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./71/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./71/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./71") = 0 mkdir("./72", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5313 attached [pid 5313] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5313] chdir("./72" [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5313 [pid 5313] <... chdir resumed>) = 0 [pid 5313] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5313] setpgid(0, 0) = 0 [pid 5313] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5313] write(3, "1000", 4) = 4 [pid 5313] close(3) = 0 [pid 5313] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5313] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5313] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5313] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5313] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5313] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5313] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5313] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5314 attached => {parent_tid=[5314]}, 88) = 5314 [pid 5314] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5313] rt_sigprocmask(SIG_SETMASK, [], [pid 5314] set_robust_list(0x7f81bb1be9a0, 24 [pid 5313] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5314] <... set_robust_list resumed>) = 0 [pid 5313] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5314] rt_sigprocmask(SIG_SETMASK, [], [pid 5313] <... futex resumed>) = 0 [pid 5314] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5313] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5314] memfd_create("syzkaller", 0 [pid 5313] <... futex resumed>) = 0 [pid 5313] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5313] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5314] <... memfd_create resumed>) = 3 [pid 5313] <... mprotect resumed>) = 0 [pid 5314] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5313] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5313] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5315]}, 88) = 5315 [pid 5313] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5313] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5313] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5315 attached [pid 5314] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5315] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5315] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5315] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5315] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5314] <... write resumed>) = 262144 [pid 5314] munmap(0x7f81b2d7d000, 262144 [pid 5315] <... open resumed>) = 4 [pid 5315] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5313] <... futex resumed>) = 0 [pid 5313] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5313] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5314] <... munmap resumed>) = 0 [pid 5314] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5315] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5314] <... openat resumed>) = 5 [ 59.688940][ T5024] EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. [pid 5314] ioctl(5, LOOP_SET_FD, 3 [pid 5315] <... mount resumed>) = 0 [pid 5315] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5315] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5313] <... futex resumed>) = 0 [pid 5313] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5315] <... futex resumed>) = 0 [pid 5313] <... futex resumed>) = 1 [pid 5315] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5315] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5313] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5315] <... futex resumed>) = 0 [pid 5315] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5313] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5313] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5315] <... futex resumed>) = 0 [pid 5315] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5313] <... futex resumed>) = 1 [pid 5313] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5314] <... ioctl resumed>) = 0 [pid 5314] close(3) = 0 [pid 5314] mkdir("./file1", 0777) = 0 [pid 5314] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5315] <... write resumed>) = 262144 [pid 5315] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5315] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5313] <... futex resumed>) = 0 [pid 5314] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5314] ioctl(5, LOOP_CLR_FD) = 0 [pid 5314] close(5) = 0 [pid 5314] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5314] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5313] exit_group(0 [pid 5315] <... futex resumed>) = ? [pid 5315] +++ exited with 0 +++ [pid 5313] <... exit_group resumed>) = ? [pid 5314] <... futex resumed>) = ? [pid 5314] +++ exited with 0 +++ [pid 5313] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5313, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./72", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./72", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./72/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./72/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./72/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./72/bus") = 0 umount2("./72/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./72/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./72/binderfs") = 0 umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./72/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./72/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./72/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./72/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./72") = 0 mkdir("./73", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5316 attached , child_tidptr=0x555556eda690) = 5316 [pid 5316] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5316] chdir("./73") = 0 [pid 5316] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5316] setpgid(0, 0) = 0 [pid 5316] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5316] write(3, "1000", 4) = 4 [pid 5316] close(3) = 0 [pid 5316] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5316] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5316] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5316] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5316] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5316] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5316] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5316] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5317 attached => {parent_tid=[5317]}, 88) = 5317 [pid 5317] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5316] rt_sigprocmask(SIG_SETMASK, [], [pid 5317] set_robust_list(0x7f81bb1be9a0, 24 [pid 5316] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5317] <... set_robust_list resumed>) = 0 [pid 5316] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5316] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5317] rt_sigprocmask(SIG_SETMASK, [], [pid 5316] <... futex resumed>) = 0 [pid 5317] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5316] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5317] memfd_create("syzkaller", 0 [pid 5316] <... mmap resumed>) = 0x7f81bb17d000 [pid 5316] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5317] <... memfd_create resumed>) = 3 [pid 5316] <... mprotect resumed>) = 0 [pid 5317] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5316] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5316] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5318 attached [pid 5317] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5316] <... clone3 resumed> => {parent_tid=[5318]}, 88) = 5318 [pid 5316] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5316] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5316] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5318] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5318] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5318] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5318] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [ 59.730661][ T5314] loop0: detected capacity change from 0 to 512 [ 59.751281][ T5314] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5318] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5317] <... write resumed>) = 262144 [pid 5317] munmap(0x7f81b2d7d000, 262144 [pid 5318] <... futex resumed>) = 1 [pid 5316] <... futex resumed>) = 0 [pid 5316] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5318] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5316] <... futex resumed>) = 0 [pid 5316] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5318] <... mount resumed>) = 0 [pid 5317] <... munmap resumed>) = 0 [pid 5317] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5318] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5316] <... futex resumed>) = 0 [pid 5318] <... futex resumed>) = 1 [pid 5316] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5318] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5316] <... futex resumed>) = 0 [pid 5318] <... open resumed>) = 6 [pid 5317] <... openat resumed>) = 5 [pid 5316] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5317] ioctl(5, LOOP_SET_FD, 3 [pid 5318] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5316] <... futex resumed>) = 0 [pid 5316] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5318] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5316] <... futex resumed>) = 0 [pid 5317] <... ioctl resumed>) = 0 [pid 5316] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5317] close(3) = 0 [pid 5317] mkdir("./file1", 0777) = 0 [pid 5317] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5318] <... write resumed>) = -1 EIO (Input/output error) [pid 5318] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5316] <... futex resumed>) = 0 [pid 5318] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5317] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5317] ioctl(5, LOOP_CLR_FD) = 0 [pid 5317] close(5) = 0 [pid 5317] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5317] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5316] exit_group(0) = ? [pid 5317] <... futex resumed>) = ? [pid 5318] <... futex resumed>) = ? [pid 5318] +++ exited with 0 +++ [pid 5317] +++ exited with 0 +++ [pid 5316] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5316, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./73", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./73/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./73/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./73/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./73/bus") = 0 umount2("./73/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./73/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./73/binderfs") = 0 umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./73/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./73/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./73/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./73") = 0 mkdir("./74", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5319 attached , child_tidptr=0x555556eda690) = 5319 [pid 5319] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5319] chdir("./74") = 0 [pid 5319] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5319] setpgid(0, 0) = 0 [pid 5319] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5319] write(3, "1000", 4) = 4 [pid 5319] close(3) = 0 [pid 5319] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5319] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5319] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5319] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5319] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5319] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5319] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5319] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5320 attached [pid 5320] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5319] <... clone3 resumed> => {parent_tid=[5320]}, 88) = 5320 [pid 5320] <... rseq resumed>) = 0 [pid 5319] rt_sigprocmask(SIG_SETMASK, [], [pid 5320] set_robust_list(0x7f81bb1be9a0, 24 [pid 5319] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5320] <... set_robust_list resumed>) = 0 [pid 5319] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5320] rt_sigprocmask(SIG_SETMASK, [], [pid 5319] <... futex resumed>) = 0 [pid 5320] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5319] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5320] memfd_create("syzkaller", 0 [pid 5319] <... futex resumed>) = 0 [pid 5319] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5320] <... memfd_create resumed>) = 3 [pid 5319] <... mmap resumed>) = 0x7f81bb17d000 [pid 5320] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5319] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5320] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5319] <... mprotect resumed>) = 0 [pid 5320] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5319] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5319] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5321 attached [pid 5321] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5319] <... clone3 resumed> => {parent_tid=[5321]}, 88) = 5321 [pid 5321] set_robust_list(0x7f81bb19d9a0, 24 [pid 5319] rt_sigprocmask(SIG_SETMASK, [], [pid 5321] <... set_robust_list resumed>) = 0 [pid 5321] rt_sigprocmask(SIG_SETMASK, [], [pid 5319] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5321] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5321] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [ 59.814244][ T5317] loop0: detected capacity change from 0 to 512 [ 59.819059][ T5318] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 59.830151][ T5318] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 59.841793][ T5317] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5319] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5321] <... open resumed>) = 4 [pid 5319] <... futex resumed>) = 0 [pid 5321] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5321] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5319] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5320] <... write resumed>) = 262144 [pid 5320] munmap(0x7f81b2d7d000, 262144 [pid 5319] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5321] <... futex resumed>) = 0 [pid 5319] <... futex resumed>) = 1 [pid 5321] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5319] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5321] <... mount resumed>) = 0 [pid 5321] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5319] <... futex resumed>) = 0 [pid 5319] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5319] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5321] <... futex resumed>) = 1 [pid 5321] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5320] <... munmap resumed>) = 0 [pid 5321] <... open resumed>) = 5 [pid 5320] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5321] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5319] <... futex resumed>) = 0 [pid 5321] <... futex resumed>) = 1 [pid 5319] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5321] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5319] <... futex resumed>) = 0 [pid 5321] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5320] <... openat resumed>) = 6 [pid 5319] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5321] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5320] ioctl(6, LOOP_SET_FD, 3 [pid 5319] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5321] <... futex resumed>) = 0 [pid 5321] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5320] <... ioctl resumed>) = 0 [pid 5320] close(3) = 0 [pid 5320] mkdir("./file1", 0777) = 0 [pid 5320] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5320] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5320] chdir("./file1") = 0 [pid 5320] ioctl(6, LOOP_CLR_FD) = 0 [pid 5320] close(6) = 0 [pid 5320] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5319] exit_group(0 [pid 5321] <... futex resumed>) = ? [pid 5319] <... exit_group resumed>) = ? [pid 5321] +++ exited with 0 +++ [pid 5320] +++ exited with 0 +++ [pid 5319] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5319, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./74", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./74", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./74/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./74/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./74/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./74/bus") = 0 umount2("./74/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./74/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./74/binderfs") = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./74/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./74/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./74/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./74/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./74") = 0 mkdir("./75", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5324 attached [pid 5324] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5324] chdir("./75") = 0 [pid 5324] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5324] setpgid(0, 0) = 0 [pid 5324] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5324] write(3, "1000", 4) = 4 [pid 5324] close(3) = 0 [pid 5324] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5324] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5324] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5324] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5324] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5324] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5324] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5324] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5325 attached => {parent_tid=[5325]}, 88) = 5325 [pid 5325] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5324] rt_sigprocmask(SIG_SETMASK, [], [pid 5325] <... rseq resumed>) = 0 [pid 5324] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5325] set_robust_list(0x7f81bb1be9a0, 24 [pid 5324] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5325] <... set_robust_list resumed>) = 0 [pid 5325] rt_sigprocmask(SIG_SETMASK, [], [pid 5324] <... futex resumed>) = 0 [pid 5325] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5324] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5325] memfd_create("syzkaller", 0 [pid 5324] <... futex resumed>) = 0 [pid 5324] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5325] <... memfd_create resumed>) = 3 [pid 5324] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5325] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5324] <... mprotect resumed>) = 0 [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5324 [pid 5325] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5324] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5325] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5324] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5324] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5326]}, 88) = 5326 [pid 5324] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5324] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5324] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5326 attached [pid 5326] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5326] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5326] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5326] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5325] <... write resumed>) = 262144 [pid 5326] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5326] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5324] <... futex resumed>) = 0 [pid 5324] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5326] <... futex resumed>) = 0 [pid 5326] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5324] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5326] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5324] <... futex resumed>) = 0 [pid 5324] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5324] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5326] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5326] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5324] <... futex resumed>) = 0 [pid 5324] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5324] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5326] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5326] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5324] <... futex resumed>) = 0 [pid 5326] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5325] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5325] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [ 59.899632][ T5320] loop0: detected capacity change from 0 to 512 [ 59.917926][ T5320] EXT4-fs (loop0): 1 orphan inode deleted [ 59.923878][ T5320] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/74/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5325] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5325] close(3) = 0 [pid 5325] mkdir("./file1", 0777) = 0 [pid 5325] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5325] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5325] chdir("./file1") = 0 [pid 5325] ioctl(6, LOOP_CLR_FD) = 0 [pid 5325] close(6) = 0 [pid 5325] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5324] exit_group(0 [pid 5326] <... futex resumed>) = ? [pid 5324] <... exit_group resumed>) = ? [pid 5326] +++ exited with 0 +++ [pid 5325] +++ exited with 0 +++ [pid 5324] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5324, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./75", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./75", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./75/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./75/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./75/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./75/bus") = 0 umount2("./75/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./75/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./75/binderfs") = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./75/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./75/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./75/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./75/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./75") = 0 [ 59.973786][ T5325] loop0: detected capacity change from 0 to 512 [ 59.998237][ T5325] EXT4-fs (loop0): 1 orphan inode deleted [ 60.004035][ T5325] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/75/file1 supports timestamps until 2038-01-19 (0x7fffffff) mkdir("./76", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5329 attached , child_tidptr=0x555556eda690) = 5329 [pid 5329] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5329] chdir("./76") = 0 [pid 5329] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5329] setpgid(0, 0) = 0 [pid 5329] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5329] write(3, "1000", 4) = 4 [pid 5329] close(3) = 0 [pid 5329] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5329] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5329] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5329] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5329] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5329] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5329] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5329] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5330 attached [pid 5330] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5330] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5330] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5330] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5329] <... clone3 resumed> => {parent_tid=[5330]}, 88) = 5330 [pid 5329] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5329] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5330] <... futex resumed>) = 0 [pid 5329] <... futex resumed>) = 1 [pid 5329] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5330] memfd_create("syzkaller", 0 [pid 5329] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5330] <... memfd_create resumed>) = 3 [pid 5330] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5329] <... mmap resumed>) = 0x7f81bb17d000 [pid 5330] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5329] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5329] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5329] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5331 attached [pid 5330] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5331] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5331] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5329] <... clone3 resumed> => {parent_tid=[5331]}, 88) = 5331 [pid 5331] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5329] rt_sigprocmask(SIG_SETMASK, [], [pid 5331] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5329] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5329] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5331] <... futex resumed>) = 0 [pid 5329] <... futex resumed>) = 1 [pid 5331] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5329] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5331] <... open resumed>) = 4 [pid 5331] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5330] <... write resumed>) = 262144 [pid 5330] munmap(0x7f81b2d7d000, 262144 [pid 5331] <... futex resumed>) = 1 [pid 5329] <... futex resumed>) = 0 [pid 5329] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5329] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5331] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5330] <... munmap resumed>) = 0 [pid 5330] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5331] <... mount resumed>) = 0 [pid 5330] <... openat resumed>) = 5 [pid 5330] ioctl(5, LOOP_SET_FD, 3 [pid 5331] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5331] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5329] <... futex resumed>) = 0 [pid 5330] <... ioctl resumed>) = 0 [pid 5329] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5330] close(3 [pid 5331] <... futex resumed>) = 0 [pid 5329] <... futex resumed>) = 1 [pid 5330] <... close resumed>) = 0 [pid 5331] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5330] mkdir("./file1", 0777 [pid 5329] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5331] <... open resumed>) = 3 [pid 5331] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5329] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5331] <... futex resumed>) = 0 [pid 5329] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5331] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5329] <... futex resumed>) = 0 [pid 5329] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5330] <... mkdir resumed>) = 0 [pid 5330] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5331] <... write resumed>) = 262144 [pid 5331] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5329] <... futex resumed>) = 0 [pid 5331] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5330] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5330] ioctl(5, LOOP_CLR_FD) = 0 [pid 5330] close(5) = 0 [pid 5330] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5330] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5329] exit_group(0) = ? [pid 5331] <... futex resumed>) = ? [pid 5330] <... futex resumed>) = ? [pid 5330] +++ exited with 0 +++ [pid 5331] +++ exited with 0 +++ [pid 5329] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5329, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./76", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./76", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./76/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./76/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./76/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./76/bus") = 0 umount2("./76/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./76/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./76/binderfs") = 0 umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./76/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./76/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./76/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./76/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./76") = 0 mkdir("./77", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5332 attached , child_tidptr=0x555556eda690) = 5332 [pid 5332] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5332] chdir("./77") = 0 [pid 5332] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5332] setpgid(0, 0) = 0 [pid 5332] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5332] write(3, "1000", 4) = 4 [pid 5332] close(3) = 0 [ 60.084655][ T5330] loop0: detected capacity change from 0 to 512 [ 60.099039][ T5330] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5332] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5332] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5332] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5332] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5332] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5332] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5332] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5333 attached => {parent_tid=[5333]}, 88) = 5333 [pid 5333] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5333] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5333] rt_sigprocmask(SIG_SETMASK, [], [pid 5332] rt_sigprocmask(SIG_SETMASK, [], [pid 5333] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5332] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5332] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5333] memfd_create("syzkaller", 0 [pid 5332] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5332] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5333] <... memfd_create resumed>) = 3 [pid 5333] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5332] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5332] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5334 attached [pid 5334] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5332] <... clone3 resumed> => {parent_tid=[5334]}, 88) = 5334 [pid 5334] <... rseq resumed>) = 0 [pid 5333] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5332] rt_sigprocmask(SIG_SETMASK, [], [pid 5334] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5334] rt_sigprocmask(SIG_SETMASK, [], [pid 5332] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5334] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5332] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5334] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5332] <... futex resumed>) = 0 [pid 5332] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5334] <... open resumed>) = 4 [pid 5334] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5332] <... futex resumed>) = 0 [pid 5332] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5334] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5332] <... futex resumed>) = 0 [pid 5334] <... mount resumed>) = 0 [pid 5333] <... write resumed>) = 262144 [pid 5332] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5333] munmap(0x7f81b2d7d000, 262144 [pid 5334] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5333] <... munmap resumed>) = 0 [pid 5333] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5332] <... futex resumed>) = 0 [pid 5334] <... futex resumed>) = 1 [pid 5332] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5334] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5333] <... openat resumed>) = 5 [pid 5332] <... futex resumed>) = 0 [pid 5333] ioctl(5, LOOP_SET_FD, 3 [pid 5334] <... open resumed>) = 6 [pid 5333] <... ioctl resumed>) = 0 [pid 5332] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5334] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5332] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5334] <... futex resumed>) = 0 [pid 5332] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5334] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5332] <... futex resumed>) = 0 [pid 5333] close(3 [pid 5332] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5333] <... close resumed>) = 0 [pid 5333] mkdir("./file1", 0777) = 0 [pid 5333] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5334] <... write resumed>) = 262144 [pid 5334] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5334] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5332] <... futex resumed>) = 0 [pid 5333] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5333] ioctl(5, LOOP_CLR_FD) = 0 [pid 5333] close(5) = 0 [pid 5333] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5332] exit_group(0 [pid 5334] <... futex resumed>) = ? [pid 5332] <... exit_group resumed>) = ? [pid 5333] <... futex resumed>) = ? [pid 5334] +++ exited with 0 +++ [pid 5333] +++ exited with 0 +++ [pid 5332] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5332, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./77", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./77", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./77/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./77/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./77/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./77/bus") = 0 umount2("./77/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./77/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./77/binderfs") = 0 umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./77/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./77/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./77/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./77/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./77") = 0 mkdir("./78", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5335 attached [pid 5335] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5335] chdir("./78") = 0 [pid 5335] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5335 [ 60.168212][ T5333] loop0: detected capacity change from 0 to 512 [ 60.182764][ T5333] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5335] setpgid(0, 0) = 0 [pid 5335] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5335] write(3, "1000", 4) = 4 [pid 5335] close(3) = 0 [pid 5335] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5335] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5335] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5335] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5335] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5335] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5335] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5335] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5336]}, 88) = 5336 [pid 5335] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5335] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5335] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5335] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5335] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5335] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5335] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5337 attached [pid 5337] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5335] <... clone3 resumed> => {parent_tid=[5337]}, 88) = 5337 [pid 5335] rt_sigprocmask(SIG_SETMASK, [], [pid 5337] <... rseq resumed>) = 0 [pid 5335] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5337] set_robust_list(0x7f81bb19d9a0, 24 [pid 5335] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5337] <... set_robust_list resumed>) = 0 [pid 5335] <... futex resumed>) = 0 [pid 5337] rt_sigprocmask(SIG_SETMASK, [], [pid 5335] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5336 attached [pid 5337] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5337] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5336] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5337] <... open resumed>) = 3 [pid 5336] <... rseq resumed>) = 0 [pid 5336] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5336] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5336] memfd_create("syzkaller", 0) = 4 [pid 5336] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5337] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5335] <... futex resumed>) = 0 [pid 5335] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5337] <... futex resumed>) = 1 [pid 5337] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5335] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5336] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5337] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5335] <... futex resumed>) = 0 [pid 5335] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5335] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5337] <... futex resumed>) = 1 [pid 5337] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5337] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5335] <... futex resumed>) = 0 [pid 5335] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5336] <... write resumed>) = 262144 [pid 5335] <... futex resumed>) = 0 [pid 5336] munmap(0x7f81b2d7d000, 262144 [pid 5337] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5335] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5337] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5337] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5336] <... munmap resumed>) = 0 [pid 5337] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5335] <... futex resumed>) = 0 [pid 5336] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5336] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5336] close(4) = 0 [pid 5336] mkdir("./file1", 0777) = 0 [pid 5336] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5336] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5336] chdir("./file1") = 0 [pid 5336] ioctl(6, LOOP_CLR_FD) = 0 [pid 5336] close(6) = 0 [pid 5336] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5336] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5335] exit_group(0) = ? [pid 5337] <... futex resumed>) = ? [pid 5336] <... futex resumed>) = ? [pid 5337] +++ exited with 0 +++ [pid 5336] +++ exited with 0 +++ [pid 5335] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5335, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./78", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./78", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./78/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./78/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./78/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./78/bus") = 0 umount2("./78/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./78/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./78/binderfs") = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 60.251564][ T5336] loop0: detected capacity change from 0 to 512 [ 60.278862][ T5336] EXT4-fs (loop0): 1 orphan inode deleted [ 60.284664][ T5336] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/78/file1 supports timestamps until 2038-01-19 (0x7fffffff) newfstatat(AT_FDCWD, "./78/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./78/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./78/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./78/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./78") = 0 mkdir("./79", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5341 attached , child_tidptr=0x555556eda690) = 5341 [pid 5341] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5341] chdir("./79") = 0 [pid 5341] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5341] setpgid(0, 0) = 0 [pid 5341] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5341] write(3, "1000", 4) = 4 [pid 5341] close(3) = 0 [pid 5341] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5341] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5341] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5341] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5341] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5341] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5341] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5342 attached => {parent_tid=[5342]}, 88) = 5342 [pid 5342] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5341] rt_sigprocmask(SIG_SETMASK, [], [pid 5342] <... rseq resumed>) = 0 [pid 5341] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5342] set_robust_list(0x7f81bb1be9a0, 24 [pid 5341] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5342] <... set_robust_list resumed>) = 0 [pid 5341] <... futex resumed>) = 0 [pid 5342] rt_sigprocmask(SIG_SETMASK, [], [pid 5341] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5342] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5341] <... futex resumed>) = 0 [pid 5342] memfd_create("syzkaller", 0 [pid 5341] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5342] <... memfd_create resumed>) = 3 [pid 5341] <... mmap resumed>) = 0x7f81bb17d000 [pid 5342] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5341] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5342] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5341] <... mprotect resumed>) = 0 [pid 5341] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5341] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5343]}, 88) = 5343 [pid 5341] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5343 attached [pid 5342] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5343] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5341] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5341] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5343] <... rseq resumed>) = 0 [pid 5343] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5342] <... write resumed>) = 262144 [pid 5342] munmap(0x7f81b2d7d000, 262144 [pid 5343] rt_sigprocmask(SIG_SETMASK, [], [pid 5342] <... munmap resumed>) = 0 [pid 5343] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5343] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5342] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5342] ioctl(5, LOOP_SET_FD, 3 [pid 5343] <... open resumed>) = 4 [pid 5343] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5341] <... futex resumed>) = 0 [pid 5343] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5341] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5343] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5341] <... futex resumed>) = 0 [pid 5343] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5341] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5343] <... mount resumed>) = 0 [pid 5343] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5341] <... futex resumed>) = 0 [pid 5341] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5343] <... futex resumed>) = 1 [pid 5343] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5343] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5341] <... futex resumed>) = 0 [pid 5341] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5343] <... futex resumed>) = 1 [pid 5343] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5342] <... ioctl resumed>) = 0 [pid 5342] close(3) = 0 [pid 5342] mkdir("./file1", 0777) = 0 [pid 5342] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5343] <... write resumed>) = -1 EIO (Input/output error) [pid 5343] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5341] <... futex resumed>) = 0 [pid 5343] <... futex resumed>) = 1 [pid 5343] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5342] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5342] ioctl(5, LOOP_CLR_FD) = 0 [pid 5342] close(5) = 0 [pid 5342] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5342] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5341] exit_group(0 [pid 5342] <... futex resumed>) = ? [pid 5341] <... exit_group resumed>) = ? [pid 5342] +++ exited with 0 +++ [pid 5343] <... futex resumed>) = ? [pid 5343] +++ exited with 0 +++ [pid 5341] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5341, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./79", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./79", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./79/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./79/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./79/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./79/bus") = 0 umount2("./79/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./79/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./79/binderfs") = 0 umount2("./79/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./79/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./79/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./79/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./79/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./79") = 0 mkdir("./80", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5344 ./strace-static-x86_64: Process 5344 attached [pid 5344] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5344] chdir("./80") = 0 [pid 5344] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5344] setpgid(0, 0) = 0 [pid 5344] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5344] write(3, "1000", 4) = 4 [pid 5344] close(3) = 0 [pid 5344] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5344] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5344] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5344] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5344] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5344] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5344] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5344] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5345 attached => {parent_tid=[5345]}, 88) = 5345 [pid 5344] rt_sigprocmask(SIG_SETMASK, [], [pid 5345] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5345] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5344] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5345] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5345] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5345] <... futex resumed>) = 0 [pid 5344] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5345] memfd_create("syzkaller", 0 [pid 5344] <... futex resumed>) = 0 [ 60.353585][ T5342] loop0: detected capacity change from 0 to 512 [ 60.360586][ T5343] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 60.370377][ T5343] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 60.382442][ T5342] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5344] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5345] <... memfd_create resumed>) = 3 [pid 5344] <... mmap resumed>) = 0x7f81bb17d000 [pid 5344] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5344] <... mprotect resumed>) = 0 [pid 5345] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5345] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5344] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5344] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5346 attached [pid 5346] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5344] <... clone3 resumed> => {parent_tid=[5346]}, 88) = 5346 [pid 5346] <... rseq resumed>) = 0 [pid 5344] rt_sigprocmask(SIG_SETMASK, [], [pid 5346] set_robust_list(0x7f81bb19d9a0, 24 [pid 5344] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5346] <... set_robust_list resumed>) = 0 [pid 5344] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5346] rt_sigprocmask(SIG_SETMASK, [], [pid 5344] <... futex resumed>) = 0 [pid 5346] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5344] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5346] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5345] <... write resumed>) = 262144 [pid 5345] munmap(0x7f81b2d7d000, 262144 [pid 5346] <... open resumed>) = 4 [pid 5346] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5344] <... futex resumed>) = 0 [pid 5345] <... munmap resumed>) = 0 [pid 5345] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5346] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5346] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5344] <... futex resumed>) = 0 [pid 5346] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5344] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5345] <... openat resumed>) = 5 [pid 5345] ioctl(5, LOOP_SET_FD, 3 [pid 5346] <... mount resumed>) = 0 [pid 5346] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5344] <... futex resumed>) = 0 [pid 5344] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5346] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5344] <... futex resumed>) = 0 [pid 5346] <... open resumed>) = 6 [pid 5344] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5346] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5344] <... futex resumed>) = 0 [pid 5344] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5346] <... futex resumed>) = 1 [pid 5344] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5346] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5345] <... ioctl resumed>) = 0 [pid 5345] close(3) = 0 [pid 5345] mkdir("./file1", 0777) = 0 [pid 5345] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5346] <... write resumed>) = 262144 [pid 5346] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5346] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] <... futex resumed>) = 0 [pid 5345] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5345] ioctl(5, LOOP_CLR_FD) = 0 [pid 5345] close(5) = 0 [pid 5345] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5344] exit_group(0 [pid 5345] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL) = ? [pid 5344] <... exit_group resumed>) = ? [pid 5346] <... futex resumed>) = ? [pid 5345] +++ exited with 0 +++ [pid 5346] +++ exited with 0 +++ [pid 5344] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5344, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./80", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./80", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./80/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./80/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./80/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./80/bus") = 0 umount2("./80/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./80/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./80/binderfs") = 0 umount2("./80/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./80/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./80/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./80/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./80/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./80") = 0 mkdir("./81", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5347 attached , child_tidptr=0x555556eda690) = 5347 [pid 5347] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5347] chdir("./81") = 0 [pid 5347] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5347] setpgid(0, 0) = 0 [pid 5347] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5347] write(3, "1000", 4) = 4 [pid 5347] close(3) = 0 [ 60.442256][ T5345] loop0: detected capacity change from 0 to 512 [ 60.455379][ T5345] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5347] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5347] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5347] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5347] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5347] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5347] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5347] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5347] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5348 attached => {parent_tid=[5348]}, 88) = 5348 [pid 5348] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5347] rt_sigprocmask(SIG_SETMASK, [], [pid 5348] <... rseq resumed>) = 0 [pid 5347] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5348] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5347] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5348] rt_sigprocmask(SIG_SETMASK, [], [pid 5347] <... futex resumed>) = 0 [pid 5348] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5347] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5348] memfd_create("syzkaller", 0 [pid 5347] <... futex resumed>) = 0 [pid 5347] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5348] <... memfd_create resumed>) = 3 [pid 5347] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5348] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5347] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5347] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5349]}, 88) = 5349 [pid 5347] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5347] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5347] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5349 attached [pid 5348] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5349] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5349] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5349] rt_sigprocmask(SIG_SETMASK, [], [pid 5348] <... write resumed>) = 262144 [pid 5349] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5348] munmap(0x7f81b2d7d000, 262144 [pid 5349] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5348] <... munmap resumed>) = 0 [pid 5348] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5348] ioctl(5, LOOP_SET_FD, 3 [pid 5349] <... open resumed>) = 4 [pid 5349] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5347] <... futex resumed>) = 0 [pid 5347] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5349] <... futex resumed>) = 1 [pid 5347] <... futex resumed>) = 0 [pid 5349] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5347] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5349] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5347] <... futex resumed>) = 0 [pid 5347] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5347] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5349] <... futex resumed>) = 1 [pid 5349] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5349] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5347] <... futex resumed>) = 0 [pid 5349] <... futex resumed>) = 1 [pid 5347] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5349] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5348] <... ioctl resumed>) = 0 [pid 5347] <... futex resumed>) = 0 [pid 5348] close(3 [pid 5347] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5348] <... close resumed>) = 0 [pid 5348] mkdir("./file1", 0777) = 0 [pid 5348] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5349] <... write resumed>) = -1 EIO (Input/output error) [pid 5349] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5347] <... futex resumed>) = 0 [pid 5349] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5348] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5348] ioctl(5, LOOP_CLR_FD) = 0 [pid 5348] close(5) = 0 [pid 5348] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5348] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5347] exit_group(0 [pid 5349] <... futex resumed>) = ? [pid 5348] <... futex resumed>) = ? [pid 5347] <... exit_group resumed>) = ? [pid 5349] +++ exited with 0 +++ [pid 5348] +++ exited with 0 +++ [pid 5347] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5347, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./81", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./81", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./81/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./81/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./81/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./81/bus") = 0 umount2("./81/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./81/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./81/binderfs") = 0 umount2("./81/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./81/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./81/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./81/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./81/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./81") = 0 mkdir("./82", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5350 attached , child_tidptr=0x555556eda690) = 5350 [pid 5350] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5350] chdir("./82") = 0 [pid 5350] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5350] setpgid(0, 0) = 0 [pid 5350] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5350] write(3, "1000", 4) = 4 [pid 5350] close(3) = 0 [pid 5350] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5350] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5350] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5350] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5350] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [ 60.516587][ T5348] loop0: detected capacity change from 0 to 512 [ 60.521490][ T5349] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 60.534269][ T5349] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 60.546872][ T5348] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5350] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5350] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5350] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5351 attached [pid 5351] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5350] <... clone3 resumed> => {parent_tid=[5351]}, 88) = 5351 [pid 5351] <... rseq resumed>) = 0 [pid 5350] rt_sigprocmask(SIG_SETMASK, [], [pid 5351] set_robust_list(0x7f81bb1be9a0, 24 [pid 5350] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5351] <... set_robust_list resumed>) = 0 [pid 5351] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5351] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5351] <... futex resumed>) = 0 [pid 5350] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5351] memfd_create("syzkaller", 0) = 3 [pid 5350] <... futex resumed>) = 0 [pid 5351] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5350] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5351] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5350] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5350] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5350] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5350] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0}./strace-static-x86_64: Process 5352 attached [pid 5352] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053) = 0 [pid 5352] set_robust_list(0x7f81b2d9d9a0, 24) = 0 [pid 5352] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5352] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5351] <... write resumed>) = 262144 [pid 5351] munmap(0x7f81b2d9e000, 262144) = 0 [pid 5351] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5351] ioctl(4, LOOP_SET_FD, 3 [pid 5350] <... clone3 resumed> => {parent_tid=[5352]}, 88) = 5352 [pid 5350] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5351] <... ioctl resumed>) = 0 [pid 5351] close(3) = 0 [pid 5351] mkdir("./file1", 0777) = 0 [pid 5350] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5351] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5350] <... futex resumed>) = 1 [pid 5352] <... futex resumed>) = 0 [pid 5352] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5350] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5352] <... open resumed>) = 3 [pid 5352] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5352] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] <... futex resumed>) = 0 [pid 5350] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5352] <... futex resumed>) = 0 [pid 5350] <... futex resumed>) = 1 [pid 5352] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5350] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5352] <... mount resumed>) = 0 [pid 5352] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5350] <... futex resumed>) = 0 [pid 5352] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5352] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5352] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5350] <... futex resumed>) = 0 [pid 5352] <... open resumed>) = 5 [pid 5350] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5352] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5350] <... futex resumed>) = 0 [pid 5352] <... futex resumed>) = 1 [pid 5352] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5350] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5350] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5352] <... write resumed>) = 262144 [pid 5352] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5352] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] <... futex resumed>) = 0 [pid 5351] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5351] ioctl(4, LOOP_CLR_FD) = 0 [pid 5351] close(4) = 0 [pid 5351] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5351] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] exit_group(0 [pid 5352] <... futex resumed>) = ? [pid 5350] <... exit_group resumed>) = ? [pid 5352] +++ exited with 0 +++ [pid 5351] <... futex resumed>) = ? [pid 5351] +++ exited with 0 +++ [pid 5350] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5350, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./82", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./82", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./82/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./82/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./82/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./82/bus") = 0 umount2("./82/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./82/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./82/binderfs") = 0 umount2("./82/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./82/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./82/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./82/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./82/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./82") = 0 mkdir("./83", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5353 ./strace-static-x86_64: Process 5353 attached [pid 5353] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5353] chdir("./83") = 0 [pid 5353] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5353] setpgid(0, 0) = 0 [pid 5353] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5353] write(3, "1000", 4) = 4 [pid 5353] close(3) = 0 [pid 5353] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5353] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5353] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5353] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5353] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5353] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5353] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5353] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5354 attached => {parent_tid=[5354]}, 88) = 5354 [pid 5353] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5353] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5353] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5353] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5353] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5354] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5353] <... mprotect resumed>) = 0 [pid 5354] <... rseq resumed>) = 0 [pid 5354] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5354] rt_sigprocmask(SIG_SETMASK, [], [pid 5353] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5354] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5353] <... rt_sigprocmask resumed>[], 8) = 0 [ 60.609362][ T5351] loop0: detected capacity change from 0 to 512 [ 60.636488][ T5351] EXT4-fs warning (device loop0): read_mmp_block:115: Error -117 while reading MMP block 8 [pid 5353] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5354] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5355 attached [pid 5353] <... clone3 resumed> => {parent_tid=[5355]}, 88) = 5355 [pid 5354] <... memfd_create resumed>) = 3 [pid 5353] rt_sigprocmask(SIG_SETMASK, [], [pid 5355] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5354] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5355] <... rseq resumed>) = 0 [pid 5353] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5353] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5354] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5355] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5353] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5355] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5355] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5355] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5353] <... futex resumed>) = 0 [pid 5355] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5353] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5355] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5353] <... futex resumed>) = 0 [pid 5355] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5353] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5355] <... mount resumed>) = 0 [pid 5354] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5355] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5353] <... futex resumed>) = 0 [pid 5355] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5353] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5353] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5355] <... futex resumed>) = 0 [pid 5355] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5355] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5355] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5353] <... futex resumed>) = 0 [pid 5355] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5353] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5355] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5353] <... futex resumed>) = 0 [pid 5355] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5353] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5355] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5353] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5355] <... futex resumed>) = 0 [pid 5355] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5354] <... write resumed>) = 262144 [pid 5354] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5354] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5354] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5354] close(3) = 0 [pid 5354] mkdir("./file1", 0777) = 0 [pid 5354] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5354] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5354] chdir("./file1") = 0 [pid 5354] ioctl(6, LOOP_CLR_FD) = 0 [pid 5354] close(6) = 0 [pid 5354] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5354] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5353] exit_group(0 [pid 5355] <... futex resumed>) = ? [pid 5354] <... futex resumed>) = ? [pid 5353] <... exit_group resumed>) = ? [pid 5355] +++ exited with 0 +++ [pid 5354] +++ exited with 0 +++ [pid 5353] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5353, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./83", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./83", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./83/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./83/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./83/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./83/bus") = 0 umount2("./83/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./83/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./83/binderfs") = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./83/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./83/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./83/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./83/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./83") = 0 mkdir("./84", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5359 ./strace-static-x86_64: Process 5359 attached [pid 5359] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5359] chdir("./84") = 0 [pid 5359] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 60.701219][ T5354] loop0: detected capacity change from 0 to 512 [ 60.718438][ T5354] EXT4-fs (loop0): 1 orphan inode deleted [ 60.724375][ T5354] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/83/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5359] setpgid(0, 0) = 0 [pid 5359] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5359] write(3, "1000", 4) = 4 [pid 5359] close(3) = 0 [pid 5359] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5359] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5359] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5359] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5359] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5359] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5359] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5359] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5360 attached => {parent_tid=[5360]}, 88) = 5360 [pid 5359] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5359] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5359] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5359] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5360] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5359] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5360] <... rseq resumed>) = 0 [pid 5360] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5360] rt_sigprocmask(SIG_SETMASK, [], [pid 5359] <... mprotect resumed>) = 0 [pid 5360] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5359] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5359] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5360] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5361 attached [pid 5359] <... clone3 resumed> => {parent_tid=[5361]}, 88) = 5361 [pid 5361] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5359] rt_sigprocmask(SIG_SETMASK, [], [pid 5360] <... memfd_create resumed>) = 3 [pid 5360] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5361] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5361] rt_sigprocmask(SIG_SETMASK, [], [pid 5360] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5359] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5361] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5361] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5359] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5361] <... futex resumed>) = 0 [pid 5361] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5359] <... futex resumed>) = 1 [pid 5359] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5361] <... open resumed>) = 4 [pid 5361] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5359] <... futex resumed>) = 0 [pid 5359] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5360] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5359] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5361] <... futex resumed>) = 1 [pid 5361] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5361] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5359] <... futex resumed>) = 0 [pid 5359] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5361] <... futex resumed>) = 1 [pid 5359] <... futex resumed>) = 0 [pid 5361] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5359] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5361] <... open resumed>) = 5 [pid 5361] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5359] <... futex resumed>) = 0 [pid 5361] <... futex resumed>) = 1 [pid 5359] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5361] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5359] <... futex resumed>) = 0 [pid 5361] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5359] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5361] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5359] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5361] <... futex resumed>) = 0 [pid 5361] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5360] <... write resumed>) = 262144 [pid 5360] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5360] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5360] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5360] close(3) = 0 [pid 5360] mkdir("./file1", 0777) = 0 [pid 5360] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5360] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5360] chdir("./file1") = 0 [pid 5360] ioctl(6, LOOP_CLR_FD) = 0 [pid 5360] close(6) = 0 [pid 5360] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5360] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5359] exit_group(0) = ? [pid 5361] <... futex resumed>) = ? [pid 5360] <... futex resumed>) = ? [pid 5361] +++ exited with 0 +++ [pid 5360] +++ exited with 0 +++ [pid 5359] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5359, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./84", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./84", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./84/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./84/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./84/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./84/bus") = 0 umount2("./84/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./84/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./84/binderfs") = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./84/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./84/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./84/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./84/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./84") = 0 mkdir("./85", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5365 ./strace-static-x86_64: Process 5365 attached [pid 5365] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5365] chdir("./85") = 0 [pid 5365] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5365] setpgid(0, 0) = 0 [pid 5365] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5365] write(3, "1000", 4) = 4 [pid 5365] close(3) = 0 [pid 5365] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5365] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5365] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5365] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5365] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [ 60.802951][ T5360] loop0: detected capacity change from 0 to 512 [ 60.817736][ T5360] EXT4-fs (loop0): 1 orphan inode deleted [ 60.823502][ T5360] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/84/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5365] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5365] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5366]}, 88) = 5366 [pid 5365] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5365] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5365] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 5366 attached [pid 5366] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5365] <... mprotect resumed>) = 0 [pid 5365] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5365] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5367 attached [pid 5366] <... rseq resumed>) = 0 [pid 5366] set_robust_list(0x7f81bb1be9a0, 24 [pid 5367] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5366] <... set_robust_list resumed>) = 0 [pid 5367] set_robust_list(0x7f81bb19d9a0, 24 [pid 5366] rt_sigprocmask(SIG_SETMASK, [], [pid 5367] <... set_robust_list resumed>) = 0 [pid 5366] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5365] <... clone3 resumed> => {parent_tid=[5367]}, 88) = 5367 [pid 5367] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5366] memfd_create("syzkaller", 0 [pid 5365] rt_sigprocmask(SIG_SETMASK, [], [pid 5367] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5366] <... memfd_create resumed>) = 3 [pid 5365] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5366] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5365] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5366] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5367] <... futex resumed>) = 0 [pid 5365] <... futex resumed>) = 1 [pid 5367] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5365] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5367] <... open resumed>) = 4 [pid 5367] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5366] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5365] <... futex resumed>) = 0 [pid 5367] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5365] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5367] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5365] <... futex resumed>) = 0 [pid 5367] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5365] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5367] <... mount resumed>) = 0 [pid 5366] <... write resumed>) = 262144 [pid 5367] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5366] munmap(0x7f81b2d7d000, 262144 [pid 5365] <... futex resumed>) = 0 [pid 5366] <... munmap resumed>) = 0 [pid 5367] <... futex resumed>) = 1 [pid 5365] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5367] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5365] <... futex resumed>) = 0 [pid 5366] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5365] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5367] <... open resumed>) = 5 [pid 5367] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5366] <... openat resumed>) = 6 [pid 5365] <... futex resumed>) = 0 [pid 5366] ioctl(6, LOOP_SET_FD, 3 [pid 5365] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5367] <... futex resumed>) = 1 [pid 5365] <... futex resumed>) = 0 [pid 5367] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5365] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5366] <... ioctl resumed>) = 0 [pid 5366] close(3) = 0 [pid 5366] mkdir("./file1", 0777) = 0 [pid 5366] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5367] <... write resumed>) = 262144 [pid 5367] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5365] <... futex resumed>) = 0 [pid 5367] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5366] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5366] ioctl(6, LOOP_CLR_FD) = 0 [pid 5366] close(6) = 0 [pid 5366] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5366] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5365] exit_group(0 [pid 5366] <... futex resumed>) = ? [pid 5365] <... exit_group resumed>) = ? [pid 5367] <... futex resumed>) = ? [pid 5367] +++ exited with 0 +++ [pid 5366] +++ exited with 0 +++ [pid 5365] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5365, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./85", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./85", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./85/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./85/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./85/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./85/bus") = 0 umount2("./85/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./85/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./85/binderfs") = 0 umount2("./85/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./85/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./85/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./85/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./85/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./85") = 0 mkdir("./86", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5368 attached , child_tidptr=0x555556eda690) = 5368 [pid 5368] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5368] chdir("./86") = 0 [pid 5368] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5368] setpgid(0, 0) = 0 [pid 5368] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5368] write(3, "1000", 4) = 4 [pid 5368] close(3) = 0 [pid 5368] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5368] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5368] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5368] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5368] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5368] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5368] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5368] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5369 attached [pid 5369] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5368] <... clone3 resumed> => {parent_tid=[5369]}, 88) = 5369 [pid 5369] <... rseq resumed>) = 0 [pid 5368] rt_sigprocmask(SIG_SETMASK, [], [pid 5369] set_robust_list(0x7f81bb1be9a0, 24 [pid 5368] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5369] <... set_robust_list resumed>) = 0 [pid 5368] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5369] rt_sigprocmask(SIG_SETMASK, [], [pid 5368] <... futex resumed>) = 0 [pid 5369] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5369] memfd_create("syzkaller", 0 [pid 5368] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5368] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5369] <... memfd_create resumed>) = 3 [pid 5368] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5369] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5368] <... mprotect resumed>) = 0 [pid 5369] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5368] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5369] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5368] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5368] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5370]}, 88) = 5370 [pid 5368] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5368] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5368] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5370 attached [ 60.900454][ T5366] loop0: detected capacity change from 0 to 512 [ 60.914681][ T5366] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5370] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5370] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5370] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5370] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5370] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5370] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5368] <... futex resumed>) = 0 [pid 5368] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5370] <... futex resumed>) = 0 [pid 5368] <... futex resumed>) = 1 [pid 5370] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5368] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5370] <... mount resumed>) = 0 [pid 5369] <... write resumed>) = 262144 [pid 5369] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5369] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5369] ioctl(5, LOOP_SET_FD, 3 [pid 5370] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5369] <... ioctl resumed>) = 0 [pid 5370] <... futex resumed>) = 1 [pid 5368] <... futex resumed>) = 0 [pid 5368] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5368] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5369] close(3) = 0 [pid 5369] mkdir("./file1", 0777 [pid 5370] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5369] <... mkdir resumed>) = 0 [pid 5369] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5370] <... open resumed>) = 3 [pid 5370] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5368] <... futex resumed>) = 0 [pid 5368] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5370] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5368] <... futex resumed>) = 0 [pid 5368] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5370] <... write resumed>) = 262144 [pid 5370] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5368] <... futex resumed>) = 0 [pid 5370] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5369] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5369] ioctl(5, LOOP_CLR_FD) = 0 [pid 5369] close(5) = 0 [pid 5369] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5369] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5368] exit_group(0 [pid 5370] <... futex resumed>) = ? [pid 5369] <... futex resumed>) = ? [pid 5368] <... exit_group resumed>) = ? [pid 5370] +++ exited with 0 +++ [pid 5369] +++ exited with 0 +++ [pid 5368] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5368, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./86", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./86", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./86/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./86/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./86/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./86/bus") = 0 umount2("./86/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./86/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./86/binderfs") = 0 umount2("./86/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./86/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./86/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./86/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./86/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./86") = 0 mkdir("./87", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5373 ./strace-static-x86_64: Process 5373 attached [pid 5373] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5373] chdir("./87") = 0 [pid 5373] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 60.964865][ T5369] loop0: detected capacity change from 0 to 512 [ 60.975914][ T5371] EXT4-fs warning (device loop0): kmmpd:168: kmmpd being stopped since MMP feature has been disabled. [ 60.987024][ T5369] EXT4-fs error (device loop0): __ext4_get_inode_loc:4379: comm syz-executor212: Invalid inode table block 0 in block_group 0 [ 61.001278][ T5369] EXT4-fs (loop0): get root inode failed [ 61.007558][ T5369] EXT4-fs (loop0): mount failed [pid 5373] setpgid(0, 0) = 0 [pid 5373] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5373] write(3, "1000", 4) = 4 [pid 5373] close(3) = 0 [pid 5373] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5373] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5373] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5373] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5373] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5373] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5373] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5373] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5374 attached => {parent_tid=[5374]}, 88) = 5374 [pid 5374] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5374] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5374] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5374] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5373] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5373] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5374] <... futex resumed>) = 0 [pid 5373] <... futex resumed>) = 1 [pid 5374] memfd_create("syzkaller", 0 [pid 5373] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5374] <... memfd_create resumed>) = 3 [pid 5374] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5373] <... futex resumed>) = 0 [pid 5373] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5374] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5373] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5374] <... write resumed>) = 262144 [pid 5373] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE [pid 5374] munmap(0x7f81b2d9e000, 262144 [pid 5373] <... mprotect resumed>) = 0 [pid 5373] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5373] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0} [pid 5374] <... munmap resumed>) = 0 [pid 5374] openat(AT_FDCWD, "/dev/loop0", O_RDWR./strace-static-x86_64: Process 5375 attached [pid 5373] <... clone3 resumed> => {parent_tid=[5375]}, 88) = 5375 [pid 5375] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053 [pid 5373] rt_sigprocmask(SIG_SETMASK, [], [pid 5375] <... rseq resumed>) = 0 [pid 5375] set_robust_list(0x7f81b2d9d9a0, 24 [pid 5373] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5375] <... set_robust_list resumed>) = 0 [pid 5373] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5375] rt_sigprocmask(SIG_SETMASK, [], [pid 5373] <... futex resumed>) = 0 [pid 5374] <... openat resumed>) = 4 [pid 5375] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5373] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5375] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5374] ioctl(4, LOOP_SET_FD, 3 [pid 5375] <... open resumed>) = 5 [pid 5375] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5375] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5373] <... futex resumed>) = 0 [pid 5373] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5375] <... futex resumed>) = 0 [pid 5373] <... futex resumed>) = 1 [pid 5373] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5375] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5374] <... ioctl resumed>) = 0 [pid 5375] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5373] <... futex resumed>) = 0 [pid 5375] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5373] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5375] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5373] <... futex resumed>) = 0 [pid 5375] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5373] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5375] <... open resumed>) = 6 [pid 5374] close(3) = 0 [pid 5374] mkdir("./file1", 0777 [pid 5375] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5373] <... futex resumed>) = 0 [pid 5373] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5375] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5373] <... futex resumed>) = 0 [pid 5373] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5374] <... mkdir resumed>) = 0 [pid 5374] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5375] <... write resumed>) = 262144 [pid 5375] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5373] <... futex resumed>) = 0 [pid 5375] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5374] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5374] ioctl(4, LOOP_CLR_FD) = 0 [pid 5374] close(4) = 0 [pid 5374] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5374] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5373] exit_group(0 [pid 5375] <... futex resumed>) = ? [pid 5373] <... exit_group resumed>) = ? [pid 5374] <... futex resumed>) = ? [pid 5375] +++ exited with 0 +++ [pid 5374] +++ exited with 0 +++ [pid 5373] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5373, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./87", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./87", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./87/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./87/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./87/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./87/bus") = 0 umount2("./87/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./87/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./87/binderfs") = 0 umount2("./87/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./87/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./87/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./87/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./87/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./87") = 0 mkdir("./88", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5376 ./strace-static-x86_64: Process 5376 attached [pid 5376] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5376] chdir("./88") = 0 [pid 5376] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5376] setpgid(0, 0) = 0 [pid 5376] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5376] write(3, "1000", 4) = 4 [pid 5376] close(3) = 0 [pid 5376] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5376] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5376] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5376] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5376] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [ 61.071966][ T5374] loop0: detected capacity change from 0 to 512 [ 61.093295][ T5374] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5376] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5376] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5376] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5377 attached => {parent_tid=[5377]}, 88) = 5377 [pid 5376] rt_sigprocmask(SIG_SETMASK, [], [pid 5377] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5376] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5377] <... rseq resumed>) = 0 [pid 5376] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5377] set_robust_list(0x7f81bb1be9a0, 24 [pid 5376] <... futex resumed>) = 0 [pid 5377] <... set_robust_list resumed>) = 0 [pid 5377] rt_sigprocmask(SIG_SETMASK, [], [pid 5376] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5377] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5376] <... futex resumed>) = 0 [pid 5376] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5377] memfd_create("syzkaller", 0 [pid 5376] <... mmap resumed>) = 0x7f81bb17d000 [pid 5376] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5377] <... memfd_create resumed>) = 3 [pid 5377] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5376] <... mprotect resumed>) = 0 [pid 5377] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5376] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5376] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5377] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144./strace-static-x86_64: Process 5378 attached [pid 5376] <... clone3 resumed> => {parent_tid=[5378]}, 88) = 5378 [pid 5376] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5376] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5376] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5378] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5378] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5378] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5377] <... write resumed>) = 262144 [pid 5378] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5377] munmap(0x7f81b2d7d000, 262144 [pid 5378] <... open resumed>) = 4 [pid 5378] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5376] <... futex resumed>) = 0 [pid 5378] <... futex resumed>) = 1 [pid 5377] <... munmap resumed>) = 0 [pid 5378] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5377] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5378] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5376] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5377] <... openat resumed>) = 5 [pid 5378] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5377] ioctl(5, LOOP_SET_FD, 3 [pid 5376] <... futex resumed>) = 0 [pid 5378] <... mount resumed>) = 0 [pid 5376] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5378] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5376] <... futex resumed>) = 0 [pid 5376] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5378] <... futex resumed>) = 1 [pid 5376] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5378] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5378] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5376] <... futex resumed>) = 0 [pid 5378] <... futex resumed>) = 1 [pid 5376] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5378] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5376] <... futex resumed>) = 0 [pid 5376] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5377] <... ioctl resumed>) = 0 [pid 5377] close(3) = 0 [pid 5377] mkdir("./file1", 0777) = 0 [pid 5377] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5378] <... write resumed>) = 262144 [pid 5378] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5376] <... futex resumed>) = 0 [pid 5378] <... futex resumed>) = 1 [pid 5378] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5377] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5377] ioctl(5, LOOP_CLR_FD) = 0 [pid 5377] close(5) = 0 [pid 5377] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5377] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5376] exit_group(0) = ? [pid 5378] <... futex resumed>) = ? [pid 5377] <... futex resumed>) = ? [pid 5378] +++ exited with 0 +++ [pid 5377] +++ exited with 0 +++ [pid 5376] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5376, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./88", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./88", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./88/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./88/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./88/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./88/bus") = 0 umount2("./88/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./88/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./88/binderfs") = 0 umount2("./88/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./88/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./88/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./88/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./88/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./88") = 0 mkdir("./89", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5379 attached , child_tidptr=0x555556eda690) = 5379 [pid 5379] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5379] chdir("./89") = 0 [pid 5379] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5379] setpgid(0, 0) = 0 [pid 5379] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5379] write(3, "1000", 4) = 4 [pid 5379] close(3) = 0 [pid 5379] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5379] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5379] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5379] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5379] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5379] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5379] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5379] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5380 attached => {parent_tid=[5380]}, 88) = 5380 [pid 5379] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5379] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5379] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5379] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5379] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5380] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5379] <... mprotect resumed>) = 0 [pid 5380] <... rseq resumed>) = 0 [ 61.161904][ T5377] loop0: detected capacity change from 0 to 512 [ 61.176162][ T5377] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5379] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5379] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5380] set_robust_list(0x7f81bb1be9a0, 24./strace-static-x86_64: Process 5381 attached [pid 5381] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5379] <... clone3 resumed> => {parent_tid=[5381]}, 88) = 5381 [pid 5381] <... rseq resumed>) = 0 [pid 5379] rt_sigprocmask(SIG_SETMASK, [], [pid 5381] set_robust_list(0x7f81bb19d9a0, 24 [pid 5379] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5381] <... set_robust_list resumed>) = 0 [pid 5379] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5381] rt_sigprocmask(SIG_SETMASK, [], [pid 5379] <... futex resumed>) = 0 [pid 5381] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5379] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5381] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5380] <... set_robust_list resumed>) = 0 [pid 5380] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5380] memfd_create("syzkaller", 0) = 4 [pid 5381] <... open resumed>) = 3 [pid 5380] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5381] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5380] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5379] <... futex resumed>) = 0 [pid 5379] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5379] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5381] <... futex resumed>) = 1 [pid 5381] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5381] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5379] <... futex resumed>) = 0 [pid 5379] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5379] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5381] <... futex resumed>) = 1 [pid 5381] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5381] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5379] <... futex resumed>) = 0 [pid 5379] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5380] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5379] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5381] <... futex resumed>) = 1 [pid 5381] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5381] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5379] <... futex resumed>) = 0 [pid 5381] <... futex resumed>) = 1 [pid 5381] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5380] <... write resumed>) = 262144 [pid 5380] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5380] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5380] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5380] close(4) = 0 [pid 5380] mkdir("./file1", 0777) = 0 [pid 5380] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5380] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5380] chdir("./file1") = 0 [pid 5380] ioctl(6, LOOP_CLR_FD) = 0 [pid 5380] close(6) = 0 [pid 5380] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5380] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5379] exit_group(0) = ? [pid 5380] <... futex resumed>) = ? [pid 5380] +++ exited with 0 +++ [pid 5381] <... futex resumed>) = ? [pid 5381] +++ exited with 0 +++ [pid 5379] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5379, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./89", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./89", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./89/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./89/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./89/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./89/bus") = 0 umount2("./89/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./89/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./89/binderfs") = 0 [ 61.231361][ T5380] loop0: detected capacity change from 0 to 512 [ 61.258016][ T5380] EXT4-fs (loop0): 1 orphan inode deleted [ 61.263791][ T5380] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/89/file1 supports timestamps until 2038-01-19 (0x7fffffff) umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./89/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./89/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./89/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./89/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./89") = 0 mkdir("./90", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5384 attached , child_tidptr=0x555556eda690) = 5384 [pid 5384] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5384] chdir("./90") = 0 [pid 5384] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5384] setpgid(0, 0) = 0 [pid 5384] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5384] write(3, "1000", 4) = 4 [pid 5384] close(3) = 0 [pid 5384] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5384] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5384] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5384] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5384] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5384] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5384] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5384] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5385 attached => {parent_tid=[5385]}, 88) = 5385 [pid 5385] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5384] rt_sigprocmask(SIG_SETMASK, [], [pid 5385] set_robust_list(0x7f81bb1be9a0, 24 [pid 5384] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5385] <... set_robust_list resumed>) = 0 [pid 5384] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5385] rt_sigprocmask(SIG_SETMASK, [], [pid 5384] <... futex resumed>) = 0 [pid 5385] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5384] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5385] memfd_create("syzkaller", 0 [pid 5384] <... futex resumed>) = 0 [pid 5384] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5385] <... memfd_create resumed>) = 3 [pid 5384] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5385] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5384] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5385] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5384] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5386]}, 88) = 5386 [pid 5384] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5384] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5384] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5385] <... write resumed>) = 262144 [pid 5385] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5385] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5385] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 5386 attached [pid 5386] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5385] <... ioctl resumed>) = 0 [pid 5385] close(3) = 0 [pid 5386] <... rseq resumed>) = 0 [pid 5386] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5386] rt_sigprocmask(SIG_SETMASK, [], [pid 5385] mkdir("./file1", 0777 [pid 5386] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5386] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5385] <... mkdir resumed>) = 0 [pid 5386] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5385] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5384] <... futex resumed>) = 0 [pid 5386] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5384] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5386] <... futex resumed>) = 0 [pid 5386] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5384] <... futex resumed>) = 1 [pid 5384] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5386] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5384] <... futex resumed>) = 0 [pid 5386] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5384] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5386] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5384] <... futex resumed>) = 0 [pid 5386] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5384] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5386] <... open resumed>) = 5 [pid 5386] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5384] <... futex resumed>) = 0 [pid 5386] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5384] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5386] <... futex resumed>) = 0 [pid 5384] <... futex resumed>) = 1 [pid 5386] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5384] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5386] <... write resumed>) = 262144 [pid 5386] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5386] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5384] <... futex resumed>) = 0 [pid 5385] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5385] ioctl(4, LOOP_CLR_FD) = 0 [pid 5385] close(4) = 0 [pid 5385] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5385] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5384] exit_group(0) = ? [pid 5385] <... futex resumed>) = ? [pid 5385] +++ exited with 0 +++ [pid 5386] <... futex resumed>) = ? [pid 5386] +++ exited with 0 +++ [pid 5384] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5384, si_uid=0, si_status=0, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./90", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./90", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./90/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./90/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./90/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./90/bus") = 0 umount2("./90/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./90/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./90/binderfs") = 0 umount2("./90/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./90/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./90/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./90/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./90/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./90") = 0 mkdir("./91", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5387 ./strace-static-x86_64: Process 5387 attached [pid 5387] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5387] chdir("./91") = 0 [pid 5387] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5387] setpgid(0, 0) = 0 [pid 5387] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5387] write(3, "1000", 4) = 4 [pid 5387] close(3) = 0 [pid 5387] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5387] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5387] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5387] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5387] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5387] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5387] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5387] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5388]}, 88) = 5388 [pid 5387] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5387] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 5388 attached [pid 5387] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5388] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5388] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5387] <... futex resumed>) = 0 [pid 5388] rt_sigprocmask(SIG_SETMASK, [], [pid 5387] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5388] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5387] <... mmap resumed>) = 0x7f81bb17d000 [pid 5387] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5388] memfd_create("syzkaller", 0) = 3 [pid 5387] <... mprotect resumed>) = 0 [pid 5388] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5387] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5387] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5389 attached [pid 5389] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5389] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5389] rt_sigprocmask(SIG_SETMASK, [], [pid 5387] <... clone3 resumed> => {parent_tid=[5389]}, 88) = 5389 [pid 5389] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5387] rt_sigprocmask(SIG_SETMASK, [], [pid 5389] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5387] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5387] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5389] <... futex resumed>) = 0 [pid 5387] <... futex resumed>) = 1 [pid 5389] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5387] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5389] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [ 61.338142][ T5385] loop0: detected capacity change from 0 to 512 [ 61.365340][ T5385] EXT4-fs warning (device loop0): read_mmp_block:115: Error -117 while reading MMP block 8 [pid 5388] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5387] <... futex resumed>) = 0 [pid 5387] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5387] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5389] <... futex resumed>) = 1 [pid 5389] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5389] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5387] <... futex resumed>) = 0 [pid 5389] <... futex resumed>) = 1 [pid 5388] <... write resumed>) = 262144 [pid 5387] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5389] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5387] <... futex resumed>) = 0 [pid 5389] <... open resumed>) = 5 [pid 5387] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5389] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5387] <... futex resumed>) = 0 [pid 5387] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5389] <... futex resumed>) = 1 [pid 5387] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5389] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5389] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5388] munmap(0x7f81b2d7d000, 262144 [pid 5389] <... futex resumed>) = 1 [pid 5387] <... futex resumed>) = 0 [pid 5389] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5388] <... munmap resumed>) = 0 [pid 5388] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5388] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5388] close(3) = 0 [pid 5388] mkdir("./file1", 0777) = 0 [pid 5388] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5388] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5388] chdir("./file1") = 0 [pid 5388] ioctl(6, LOOP_CLR_FD) = 0 [pid 5388] close(6) = 0 [pid 5388] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5388] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5387] exit_group(0 [pid 5388] <... futex resumed>) = ? [pid 5387] <... exit_group resumed>) = ? [pid 5388] +++ exited with 0 +++ [pid 5389] <... futex resumed>) = ? [pid 5389] +++ exited with 0 +++ [pid 5387] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5387, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./91", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./91", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./91/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./91/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./91/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./91/bus") = 0 umount2("./91/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./91/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./91/binderfs") = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./91/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./91/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./91/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./91/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./91") = 0 mkdir("./92", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5392 ./strace-static-x86_64: Process 5392 attached [pid 5392] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5392] chdir("./92") = 0 [pid 5392] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5392] setpgid(0, 0) = 0 [ 61.423052][ T5388] loop0: detected capacity change from 0 to 512 [ 61.438947][ T5388] EXT4-fs (loop0): 1 orphan inode deleted [ 61.444867][ T5388] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/91/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5392] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5392] write(3, "1000", 4) = 4 [pid 5392] close(3) = 0 [pid 5392] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5392] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5392] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5392] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5392] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5392] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5392] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5393 attached => {parent_tid=[5393]}, 88) = 5393 [pid 5393] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5392] rt_sigprocmask(SIG_SETMASK, [], [pid 5393] <... rseq resumed>) = 0 [pid 5393] set_robust_list(0x7f81bb1be9a0, 24 [pid 5392] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5393] <... set_robust_list resumed>) = 0 [pid 5392] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5393] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5392] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5393] memfd_create("syzkaller", 0 [pid 5392] <... mmap resumed>) = 0x7f81bb17d000 [pid 5393] <... memfd_create resumed>) = 3 [pid 5393] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5392] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5393] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5392] <... mprotect resumed>) = 0 [pid 5392] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5392] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5394 attached => {parent_tid=[5394]}, 88) = 5394 [pid 5394] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5392] rt_sigprocmask(SIG_SETMASK, [], [pid 5394] set_robust_list(0x7f81bb19d9a0, 24 [pid 5392] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5394] <... set_robust_list resumed>) = 0 [pid 5392] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5394] rt_sigprocmask(SIG_SETMASK, [], [pid 5392] <... futex resumed>) = 0 [pid 5394] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5392] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5394] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5393] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5394] <... open resumed>) = 4 [pid 5394] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5392] <... futex resumed>) = 0 [pid 5394] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5392] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5394] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5392] <... futex resumed>) = 0 [pid 5394] <... mount resumed>) = 0 [pid 5393] <... write resumed>) = 262144 [pid 5392] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5394] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5392] <... futex resumed>) = 0 [pid 5393] munmap(0x7f81b2d7d000, 262144 [pid 5392] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5394] <... futex resumed>) = 1 [pid 5392] <... futex resumed>) = 0 [pid 5394] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5392] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5394] <... open resumed>) = 5 [pid 5394] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5392] <... futex resumed>) = 0 [pid 5394] <... futex resumed>) = 1 [pid 5393] <... munmap resumed>) = 0 [pid 5392] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5394] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5392] <... futex resumed>) = 0 [pid 5394] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5392] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5394] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5392] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5394] <... futex resumed>) = 0 [pid 5393] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5394] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5393] <... openat resumed>) = 6 [pid 5393] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5393] close(3) = 0 [pid 5393] mkdir("./file1", 0777) = 0 [pid 5393] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5393] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5393] chdir("./file1") = 0 [pid 5393] ioctl(6, LOOP_CLR_FD) = 0 [pid 5393] close(6) = 0 [pid 5393] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5393] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5392] exit_group(0 [pid 5394] <... futex resumed>) = ? [pid 5393] <... futex resumed>) = ? [pid 5392] <... exit_group resumed>) = ? [pid 5394] +++ exited with 0 +++ [pid 5393] +++ exited with 0 +++ [pid 5392] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5392, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./92", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./92", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./92/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./92/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./92/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./92/bus") = 0 umount2("./92/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./92/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./92/binderfs") = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./92/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./92/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./92/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./92/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./92") = 0 [ 61.522508][ T5393] loop0: detected capacity change from 0 to 512 [ 61.548511][ T5393] EXT4-fs (loop0): 1 orphan inode deleted [ 61.554503][ T5393] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/92/file1 supports timestamps until 2038-01-19 (0x7fffffff) mkdir("./93", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5397 attached , child_tidptr=0x555556eda690) = 5397 [pid 5397] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5397] chdir("./93") = 0 [pid 5397] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5397] setpgid(0, 0) = 0 [pid 5397] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5397] write(3, "1000", 4) = 4 [pid 5397] close(3) = 0 [pid 5397] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5397] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5397] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5397] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5397] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5397] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5397] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5397] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5398]}, 88) = 5398 [pid 5397] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5397] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5398 attached [pid 5398] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5398] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5398] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5398] memfd_create("syzkaller", 0 [pid 5397] <... futex resumed>) = 0 [pid 5398] <... memfd_create resumed>) = 3 [pid 5397] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5398] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d9e000 [pid 5397] <... futex resumed>) = 0 [pid 5397] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81b2d7d000 [pid 5397] mprotect(0x7f81b2d7e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5397] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5397] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81b2d9d990, parent_tid=0x7f81b2d9d990, exit_signal=0, stack=0x7f81b2d7d000, stack_size=0x20300, tls=0x7f81b2d9d6c0} => {parent_tid=[5399]}, 88) = 5399 [pid 5397] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 ./strace-static-x86_64: Process 5399 attached [pid 5399] rseq(0x7f81b2d9dfe0, 0x20, 0, 0x53053053) = 0 [pid 5397] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] set_robust_list(0x7f81b2d9d9a0, 24 [pid 5397] <... futex resumed>) = 0 [pid 5397] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5399] <... set_robust_list resumed>) = 0 [pid 5398] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5399] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5398] <... write resumed>) = 262144 [pid 5399] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5398] munmap(0x7f81b2d9e000, 262144 [pid 5399] <... open resumed>) = 4 [pid 5399] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5397] <... futex resumed>) = 0 [pid 5399] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5397] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] <... futex resumed>) = 0 [pid 5397] <... futex resumed>) = 1 [pid 5399] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5397] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5399] <... mount resumed>) = 0 [pid 5398] <... munmap resumed>) = 0 [pid 5399] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5397] <... futex resumed>) = 0 [pid 5399] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5397] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] <... futex resumed>) = 0 [pid 5397] <... futex resumed>) = 1 [pid 5399] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5397] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5399] <... open resumed>) = 5 [pid 5399] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5398] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5399] <... futex resumed>) = 1 [pid 5397] <... futex resumed>) = 0 [pid 5399] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5398] <... openat resumed>) = 6 [pid 5397] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5398] ioctl(6, LOOP_SET_FD, 3 [pid 5397] <... futex resumed>) = 0 [pid 5399] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5397] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5399] <... futex resumed>) = 0 [pid 5399] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5398] <... ioctl resumed>) = 0 [pid 5398] close(3) = 0 [pid 5398] mkdir("./file1", 0777) = 0 [pid 5398] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5398] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5398] chdir("./file1") = 0 [pid 5398] ioctl(6, LOOP_CLR_FD) = 0 [pid 5398] close(6) = 0 [pid 5398] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5398] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5397] exit_group(0) = ? [pid 5398] <... futex resumed>) = ? [pid 5398] +++ exited with 0 +++ [pid 5399] <... futex resumed>) = ? [pid 5399] +++ exited with 0 +++ [pid 5397] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5397, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./93", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./93", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./93/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./93/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./93/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./93/bus") = 0 umount2("./93/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./93/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./93/binderfs") = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./93/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./93/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./93/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./93/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./93") = 0 mkdir("./94", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5402 attached , child_tidptr=0x555556eda690) = 5402 [pid 5402] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5402] chdir("./94") = 0 [pid 5402] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5402] setpgid(0, 0) = 0 [pid 5402] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5402] write(3, "1000", 4) = 4 [pid 5402] close(3) = 0 [ 61.640682][ T5398] loop0: detected capacity change from 0 to 512 [ 61.658592][ T5398] EXT4-fs (loop0): 1 orphan inode deleted [ 61.664584][ T5398] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/93/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5402] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5402] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5402] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5402] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5402] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5402] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5402] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5402] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5403 attached => {parent_tid=[5403]}, 88) = 5403 [pid 5402] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5403] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5402] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5403] <... rseq resumed>) = 0 [pid 5402] <... futex resumed>) = 0 [pid 5402] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5403] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5402] <... futex resumed>) = 0 [pid 5403] rt_sigprocmask(SIG_SETMASK, [], [pid 5402] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5403] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5403] memfd_create("syzkaller", 0 [pid 5402] <... mmap resumed>) = 0x7f81bb17d000 [pid 5402] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5402] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5402] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5404]}, 88) = 5404 [pid 5402] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5404 attached [pid 5403] <... memfd_create resumed>) = 3 [pid 5402] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5402] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5402] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5404] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5404] set_robust_list(0x7f81bb19d9a0, 24 [pid 5403] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5404] <... set_robust_list resumed>) = 0 [pid 5403] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5404] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5403] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5404] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5403] <... write resumed>) = 262144 [pid 5403] munmap(0x7f81b2d7d000, 262144) = 0 [ 61.729468][ T5403] __do_sys_memfd_create: 39 callbacks suppressed [ 61.729484][ T5403] syz-executor212[5403]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 61.760155][ T28] kauditd_printk_skb: 39 callbacks suppressed [pid 5403] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5403] ioctl(5, LOOP_SET_FD, 3 [pid 5404] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5402] <... futex resumed>) = 0 [pid 5404] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5402] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5404] <... futex resumed>) = 0 [pid 5402] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5404] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5403] <... ioctl resumed>) = 0 [pid 5404] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5402] <... futex resumed>) = 0 [pid 5404] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5402] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5404] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5402] <... futex resumed>) = 0 [pid 5404] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5402] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5404] <... open resumed>) = 6 [pid 5403] close(3 [pid 5404] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5402] <... futex resumed>) = 0 [pid 5402] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5404] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5402] <... futex resumed>) = 0 [pid 5402] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5403] <... close resumed>) = 0 [pid 5403] mkdir("./file1", 0777) = 0 [pid 5403] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5404] <... write resumed>) = 262144 [pid 5404] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5403] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5402] <... futex resumed>) = 0 [pid 5404] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5403] ioctl(5, LOOP_CLR_FD) = 0 [pid 5403] close(5) = 0 [pid 5403] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5402] exit_group(0 [pid 5404] <... futex resumed>) = ? [pid 5402] <... exit_group resumed>) = ? [pid 5404] +++ exited with 0 +++ [pid 5403] +++ exited with 0 +++ [pid 5402] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5402, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./94", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./94", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./94/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./94/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./94/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./94/bus") = 0 umount2("./94/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./94/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./94/binderfs") = 0 umount2("./94/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./94/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./94/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./94/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./94/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./94") = 0 mkdir("./95", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5405 ./strace-static-x86_64: Process 5405 attached [pid 5405] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5405] chdir("./95") = 0 [pid 5405] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5405] setpgid(0, 0) = 0 [pid 5405] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5405] write(3, "1000", 4) = 4 [pid 5405] close(3) = 0 [pid 5405] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5405] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5405] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5405] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5405] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [ 61.760167][ T28] audit: type=1800 audit(1693866692.501:96): pid=5404 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 61.768487][ T5403] loop0: detected capacity change from 0 to 512 [ 61.804513][ T5403] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5405] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5405] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5405] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5406 attached => {parent_tid=[5406]}, 88) = 5406 [pid 5405] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5405] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5405] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5405] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5405] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5406] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5406] set_robust_list(0x7f81bb1be9a0, 24 [pid 5405] <... mprotect resumed>) = 0 [pid 5406] <... set_robust_list resumed>) = 0 [pid 5405] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5406] rt_sigprocmask(SIG_SETMASK, [], [pid 5405] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5406] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5405] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5407 attached [pid 5406] memfd_create("syzkaller", 0 [pid 5405] <... clone3 resumed> => {parent_tid=[5407]}, 88) = 5407 [pid 5407] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5405] rt_sigprocmask(SIG_SETMASK, [], [pid 5407] set_robust_list(0x7f81bb19d9a0, 24 [pid 5405] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5407] <... set_robust_list resumed>) = 0 [pid 5405] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5407] rt_sigprocmask(SIG_SETMASK, [], [pid 5405] <... futex resumed>) = 0 [pid 5407] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5405] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5407] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5407] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5407] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5405] <... futex resumed>) = 0 [pid 5405] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5407] <... futex resumed>) = 0 [pid 5407] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5407] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5407] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5405] <... futex resumed>) = 1 [pid 5405] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5405] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5407] <... futex resumed>) = 0 [pid 5405] <... futex resumed>) = 1 [pid 5407] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 4 [pid 5407] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5407] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5405] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5405] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5407] <... futex resumed>) = 0 [pid 5405] <... futex resumed>) = 1 [pid 5407] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5407] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5407] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5405] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5406] <... memfd_create resumed>) = 5 [pid 5406] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5406] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5406] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5406] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5406] ioctl(6, LOOP_SET_FD, 5) = 0 [pid 5406] close(5) = 0 [pid 5406] mkdir("./file1", 0777) = 0 [ 61.863859][ T5406] syz-executor212[5406]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 61.873557][ T28] audit: type=1800 audit(1693866692.601:97): pid=5407 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 61.901333][ T5406] loop0: detected capacity change from 0 to 512 [pid 5406] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5406] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 5 [pid 5406] chdir("./file1") = 0 [pid 5406] ioctl(6, LOOP_CLR_FD) = 0 [pid 5406] close(6) = 0 [pid 5406] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5406] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5405] exit_group(0) = ? [pid 5407] <... futex resumed>) = ? [pid 5406] <... futex resumed>) = ? [pid 5407] +++ exited with 0 +++ [pid 5406] +++ exited with 0 +++ [pid 5405] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5405, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./95", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./95", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./95/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./95/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./95/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./95/bus") = 0 umount2("./95/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./95/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./95/binderfs") = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./95/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./95/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./95/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./95/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./95") = 0 mkdir("./96", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5410 attached [pid 5410] set_robust_list(0x555556eda6a0, 24 [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5410 [pid 5410] <... set_robust_list resumed>) = 0 [pid 5410] chdir("./96") = 0 [pid 5410] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5410] setpgid(0, 0) = 0 [pid 5410] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5410] write(3, "1000", 4) = 4 [pid 5410] close(3) = 0 [pid 5410] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5410] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5410] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5410] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5410] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5410] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5410] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5411 attached [pid 5411] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [ 61.918192][ T5406] EXT4-fs (loop0): 1 orphan inode deleted [ 61.924140][ T5406] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/95/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5410] <... clone3 resumed> => {parent_tid=[5411]}, 88) = 5411 [pid 5411] <... rseq resumed>) = 0 [pid 5411] set_robust_list(0x7f81bb1be9a0, 24 [pid 5410] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5410] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5410] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5411] <... set_robust_list resumed>) = 0 [pid 5411] rt_sigprocmask(SIG_SETMASK, [], [pid 5410] <... mprotect resumed>) = 0 [pid 5411] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5410] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5410] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5411] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5412 attached [pid 5412] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5412] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5412] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5412] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5410] <... clone3 resumed> => {parent_tid=[5412]}, 88) = 5412 [pid 5410] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5410] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5412] <... futex resumed>) = 0 [pid 5410] <... futex resumed>) = 1 [pid 5412] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5410] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5412] <... open resumed>) = 3 [pid 5411] <... memfd_create resumed>) = 4 [pid 5412] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5410] <... futex resumed>) = 0 [pid 5410] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5412] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5411] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5410] <... futex resumed>) = 0 [pid 5410] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5411] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5412] <... mount resumed>) = 0 [pid 5412] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5410] <... futex resumed>) = 0 [pid 5412] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5410] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5412] <... open resumed>) = 5 [pid 5412] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5410] <... futex resumed>) = 0 [pid 5412] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5410] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5410] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5412] <... futex resumed>) = 0 [pid 5412] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5412] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5410] <... futex resumed>) = 0 [pid 5412] <... futex resumed>) = 1 [pid 5412] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5411] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5411] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5411] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5411] ioctl(6, LOOP_SET_FD, 4) = 0 [pid 5411] close(4) = 0 [pid 5411] mkdir("./file1", 0777) = 0 [ 61.981241][ T5411] syz-executor212[5411]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 61.984587][ T28] audit: type=1800 audit(1693866692.721:98): pid=5412 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 62.021044][ T5411] loop0: detected capacity change from 0 to 512 [pid 5411] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5411] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5411] chdir("./file1") = 0 [pid 5411] ioctl(6, LOOP_CLR_FD) = 0 [pid 5411] close(6) = 0 [pid 5411] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5410] exit_group(0 [pid 5412] <... futex resumed>) = ? [pid 5410] <... exit_group resumed>) = ? [pid 5412] +++ exited with 0 +++ [pid 5411] <... futex resumed>) = ? [pid 5411] +++ exited with 0 +++ [pid 5410] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5410, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./96", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./96", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./96/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./96/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./96/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./96/bus") = 0 umount2("./96/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./96/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./96/binderfs") = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./96/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./96/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 62.038062][ T5411] EXT4-fs (loop0): 1 orphan inode deleted [ 62.043955][ T5411] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/96/file1 supports timestamps until 2038-01-19 (0x7fffffff) openat(AT_FDCWD, "./96/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./96/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./96") = 0 mkdir("./97", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5415 attached , child_tidptr=0x555556eda690) = 5415 [pid 5415] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5415] chdir("./97") = 0 [pid 5415] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5415] setpgid(0, 0) = 0 [pid 5415] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5415] write(3, "1000", 4) = 4 [pid 5415] close(3) = 0 [pid 5415] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5415] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5415] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5415] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5415] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5415] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5415] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5416 attached => {parent_tid=[5416]}, 88) = 5416 [pid 5415] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5416] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5416] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5416] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5416] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5415] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5416] <... futex resumed>) = 0 [pid 5416] memfd_create("syzkaller", 0 [pid 5415] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5415] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5415] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5415] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5417]}, 88) = 5417 [pid 5415] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5415] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5415] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5417 attached [pid 5417] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5417] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5417] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5417] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5416] <... memfd_create resumed>) = 3 [pid 5416] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5417] <... open resumed>) = 4 [pid 5416] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5417] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5417] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5415] <... futex resumed>) = 0 [pid 5415] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5417] <... futex resumed>) = 0 [pid 5415] <... futex resumed>) = 1 [pid 5417] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5417] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5417] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5415] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5415] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5417] <... futex resumed>) = 0 [pid 5415] <... futex resumed>) = 1 [pid 5417] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5417] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5416] <... write resumed>) = 262144 [pid 5417] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5415] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5415] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5417] <... futex resumed>) = 0 [pid 5415] <... futex resumed>) = 1 [pid 5417] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5416] munmap(0x7f81b2d7d000, 262144 [pid 5417] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5415] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5417] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5415] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5417] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5416] <... munmap resumed>) = 0 [pid 5416] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5416] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5416] close(3) = 0 [pid 5416] mkdir("./file1", 0777) = 0 [ 62.133807][ T5416] syz-executor212[5416]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 62.145291][ T28] audit: type=1800 audit(1693866692.891:99): pid=5417 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 62.170805][ T5416] loop0: detected capacity change from 0 to 512 [pid 5416] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5416] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5416] chdir("./file1") = 0 [pid 5416] ioctl(6, LOOP_CLR_FD) = 0 [pid 5416] close(6) = 0 [pid 5416] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5416] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5415] exit_group(0 [pid 5417] <... futex resumed>) = ? [pid 5416] <... futex resumed>) = ? [pid 5415] <... exit_group resumed>) = ? [pid 5417] +++ exited with 0 +++ [pid 5416] +++ exited with 0 +++ [pid 5415] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5415, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./97", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./97", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./97/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./97/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./97/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./97/bus") = 0 umount2("./97/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./97/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./97/binderfs") = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./97/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./97/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./97/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./97/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./97") = 0 [ 62.188057][ T5416] EXT4-fs (loop0): 1 orphan inode deleted [ 62.193849][ T5416] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/97/file1 supports timestamps until 2038-01-19 (0x7fffffff) mkdir("./98", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5420 attached , child_tidptr=0x555556eda690) = 5420 [pid 5420] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5420] chdir("./98") = 0 [pid 5420] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5420] setpgid(0, 0) = 0 [pid 5420] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5420] write(3, "1000", 4) = 4 [pid 5420] close(3) = 0 [pid 5420] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5420] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5420] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5420] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5420] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5420] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5420] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5420] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5421]}, 88) = 5421 ./strace-static-x86_64: Process 5421 attached [pid 5421] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5420] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5420] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5420] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5420] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5421] <... rseq resumed>) = 0 [pid 5421] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5420] <... mmap resumed>) = 0x7f81bb17d000 [pid 5420] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5421] rt_sigprocmask(SIG_SETMASK, [], [pid 5420] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5420] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5421] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5421] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5422 attached [pid 5420] <... clone3 resumed> => {parent_tid=[5422]}, 88) = 5422 [pid 5422] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5420] rt_sigprocmask(SIG_SETMASK, [], [pid 5422] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5420] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5422] rt_sigprocmask(SIG_SETMASK, [], [pid 5420] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5422] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5420] <... futex resumed>) = 0 [pid 5422] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5420] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5422] <... open resumed>) = 3 [pid 5421] <... memfd_create resumed>) = 4 [pid 5421] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5421] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5421] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5421] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5421] ioctl(5, LOOP_SET_FD, 4 [pid 5422] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5420] <... futex resumed>) = 0 [pid 5422] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5420] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5422] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5420] <... futex resumed>) = 0 [pid 5422] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5420] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5421] <... ioctl resumed>) = 0 [pid 5422] <... mount resumed>) = 0 [pid 5422] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5421] close(4) = 0 [pid 5420] <... futex resumed>) = 0 [pid 5422] <... futex resumed>) = 1 [pid 5420] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5422] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5420] <... futex resumed>) = 0 [pid 5422] <... open resumed>) = 4 [pid 5421] mkdir("./file1", 0777 [pid 5420] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5422] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5421] <... mkdir resumed>) = 0 [pid 5420] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5422] <... futex resumed>) = 0 [pid 5421] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5420] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5422] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5420] <... futex resumed>) = 0 [ 62.270122][ T5421] syz-executor212[5421]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 62.270952][ T28] audit: type=1800 audit(1693866693.011:100): pid=5422 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 62.302034][ T5421] loop0: detected capacity change from 0 to 512 [pid 5420] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5422] <... write resumed>) = 262144 [pid 5422] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5420] <... futex resumed>) = 0 [pid 5422] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5421] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5421] ioctl(5, LOOP_CLR_FD) = 0 [pid 5421] close(5) = 0 [pid 5421] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5421] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5420] exit_group(0 [pid 5421] <... futex resumed>) = ? [pid 5421] +++ exited with 0 +++ [pid 5422] <... futex resumed>) = ? [pid 5422] +++ exited with 0 +++ [pid 5420] <... exit_group resumed>) = ? [pid 5420] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5420, si_uid=0, si_status=0, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./98", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./98", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./98/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./98/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./98/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./98/bus") = 0 umount2("./98/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./98/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./98/binderfs") = 0 umount2("./98/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./98/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./98/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./98/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./98/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./98") = 0 mkdir("./99", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5425 ./strace-static-x86_64: Process 5425 attached [pid 5425] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5425] chdir("./99") = 0 [pid 5425] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5425] setpgid(0, 0) = 0 [pid 5425] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5425] write(3, "1000", 4) = 4 [pid 5425] close(3) = 0 [pid 5425] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5425] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5425] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5425] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5425] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5425] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5425] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5425] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5426 attached => {parent_tid=[5426]}, 88) = 5426 [pid 5426] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5425] rt_sigprocmask(SIG_SETMASK, [], [pid 5426] <... rseq resumed>) = 0 [pid 5426] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5426] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5426] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5425] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5426] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5425] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5426] memfd_create("syzkaller", 0 [pid 5425] <... futex resumed>) = 0 [ 62.318690][ T5423] EXT4-fs warning (device loop0): kmmpd:168: kmmpd being stopped since MMP feature has been disabled. [ 62.325220][ T5421] EXT4-fs error (device loop0): __ext4_get_inode_loc:4379: comm syz-executor212: Invalid inode table block 0 in block_group 0 [ 62.343363][ T5421] EXT4-fs (loop0): get root inode failed [ 62.349067][ T5421] EXT4-fs (loop0): mount failed [pid 5425] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5425] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5425] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5425] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5425] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5427]}, 88) = 5427 [pid 5425] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5425] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5425] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5427 attached [pid 5426] <... memfd_create resumed>) = 3 [pid 5427] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5426] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5427] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5426] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5427] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5427] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5426] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5427] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5427] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5425] <... futex resumed>) = 0 [pid 5425] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5427] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5427] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5425] <... futex resumed>) = 0 [pid 5427] <... mount resumed>) = 0 [pid 5425] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5426] <... write resumed>) = 262144 [pid 5427] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5426] munmap(0x7f81b2d7d000, 262144 [pid 5427] <... futex resumed>) = 0 [pid 5425] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5427] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5426] <... munmap resumed>) = 0 [pid 5425] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5427] <... open resumed>) = 5 [pid 5425] <... futex resumed>) = 0 [pid 5426] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5427] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5426] <... openat resumed>) = 6 [pid 5425] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5427] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5426] ioctl(6, LOOP_SET_FD, 3 [pid 5425] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5425] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5425] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5427] <... futex resumed>) = 0 [ 62.392337][ T5426] syz-executor212[5426]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 62.405587][ T28] audit: type=1800 audit(1693866693.151:101): pid=5427 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 62.429977][ T5426] loop0: detected capacity change from 0 to 512 [pid 5427] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5426] <... ioctl resumed>) = 0 [pid 5426] close(3) = 0 [pid 5426] mkdir("./file1", 0777) = 0 [pid 5426] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5427] <... write resumed>) = -1 EIO (Input/output error) [pid 5427] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5425] <... futex resumed>) = 0 [pid 5427] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5426] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5426] ioctl(6, LOOP_CLR_FD) = 0 [pid 5426] close(6) = 0 [pid 5426] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5426] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5425] exit_group(0) = ? [pid 5427] <... futex resumed>) = ? [pid 5426] <... futex resumed>) = ? [pid 5427] +++ exited with 0 +++ [pid 5426] +++ exited with 0 +++ [pid 5425] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5425, si_uid=0, si_status=0, si_utime=0, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./99", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./99", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./99/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./99/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./99/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./99/bus") = 0 umount2("./99/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./99/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./99/binderfs") = 0 umount2("./99/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./99/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./99/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./99/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./99/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./99") = 0 mkdir("./100", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5428 attached , child_tidptr=0x555556eda690) = 5428 [pid 5428] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5428] chdir("./100") = 0 [pid 5428] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5428] setpgid(0, 0) = 0 [pid 5428] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5428] write(3, "1000", 4) = 4 [pid 5428] close(3) = 0 [pid 5428] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5428] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5428] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5428] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5428] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5428] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5428] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5428] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5429 attached => {parent_tid=[5429]}, 88) = 5429 [pid 5428] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5428] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5428] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5428] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5429] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5429] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5428] <... mmap resumed>) = 0x7f81bb17d000 [ 62.436594][ T5427] I/O error, dev loop0, sector 248 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 [ 62.447604][ T5427] Buffer I/O error on dev loop0, logical block 31, lost async page write [ 62.460364][ T5426] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5428] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5429] rt_sigprocmask(SIG_SETMASK, [], [pid 5428] <... mprotect resumed>) = 0 [pid 5428] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5429] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5428] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5428] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5430 attached => {parent_tid=[5430]}, 88) = 5430 [pid 5430] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5428] rt_sigprocmask(SIG_SETMASK, [], [pid 5430] set_robust_list(0x7f81bb19d9a0, 24 [pid 5428] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5430] <... set_robust_list resumed>) = 0 [pid 5428] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5430] rt_sigprocmask(SIG_SETMASK, [], [pid 5428] <... futex resumed>) = 0 [pid 5430] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5428] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5430] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5429] memfd_create("syzkaller", 0 [pid 5430] <... open resumed>) = 3 [pid 5430] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5429] <... memfd_create resumed>) = 4 [pid 5430] <... futex resumed>) = 1 [pid 5430] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5429] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5429] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5429] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5429] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 5429] ioctl(5, LOOP_SET_FD, 4 [pid 5428] <... futex resumed>) = 0 [pid 5428] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5428] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5430] <... futex resumed>) = 0 [pid 5430] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5430] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5428] <... futex resumed>) = 0 [pid 5428] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5428] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5430] <... futex resumed>) = 1 [pid 5430] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5430] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5428] <... futex resumed>) = 0 [pid 5428] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5428] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5429] <... ioctl resumed>) = 0 [pid 5429] close(4) = 0 [pid 5429] mkdir("./file1", 0777 [pid 5430] <... futex resumed>) = 1 [pid 5429] <... mkdir resumed>) = 0 [pid 5429] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5430] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 262144 [pid 5430] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5428] <... futex resumed>) = 0 [ 62.504671][ T5429] syz-executor212[5429]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 62.505327][ T28] audit: type=1800 audit(1693866693.251:102): pid=5430 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 62.533049][ T5429] loop0: detected capacity change from 0 to 512 [pid 5430] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5429] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 5429] ioctl(5, LOOP_CLR_FD) = 0 [pid 5429] close(5) = 0 [pid 5429] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5429] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5428] exit_group(0 [pid 5430] <... futex resumed>) = ? [pid 5429] <... futex resumed>) = ? [pid 5428] <... exit_group resumed>) = ? [pid 5430] +++ exited with 0 +++ [pid 5429] +++ exited with 0 +++ [pid 5428] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5428, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./100", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./100", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./100/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./100/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./100/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./100/bus") = 0 umount2("./100/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./100/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./100/binderfs") = 0 umount2("./100/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./100/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./100/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./100/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./100/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./100") = 0 mkdir("./101", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5431 ./strace-static-x86_64: Process 5431 attached [pid 5431] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5431] chdir("./101") = 0 [pid 5431] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5431] setpgid(0, 0) = 0 [pid 5431] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5431] write(3, "1000", 4) = 4 [pid 5431] close(3) = 0 [pid 5431] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5431] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5431] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5431] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5431] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5431] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5431] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5431] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5432 attached [ 62.565169][ T5429] EXT4-fs warning (device loop0): read_mmp_block:115: Error -117 while reading MMP block 8 [pid 5432] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5432] set_robust_list(0x7f81bb1be9a0, 24 [pid 5431] <... clone3 resumed> => {parent_tid=[5432]}, 88) = 5432 [pid 5432] <... set_robust_list resumed>) = 0 [pid 5431] rt_sigprocmask(SIG_SETMASK, [], [pid 5432] rt_sigprocmask(SIG_SETMASK, [], [pid 5431] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5432] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5431] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5432] memfd_create("syzkaller", 0 [pid 5431] <... futex resumed>) = 0 [pid 5431] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5431] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5431] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5431] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5431] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} => {parent_tid=[5433]}, 88) = 5433 [pid 5431] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5431] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5431] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5433 attached [pid 5433] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5433] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5433] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5433] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 3 [pid 5432] <... memfd_create resumed>) = 4 [pid 5433] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5432] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5433] <... futex resumed>) = 1 [pid 5433] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5432] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5431] <... futex resumed>) = 0 [pid 5431] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5433] <... futex resumed>) = 0 [pid 5431] <... futex resumed>) = 1 [pid 5433] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5433] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5432] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5433] <... futex resumed>) = 0 [pid 5432] <... write resumed>) = 262144 [pid 5431] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5433] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5432] munmap(0x7f81b2d7d000, 262144 [pid 5431] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5432] <... munmap resumed>) = 0 [pid 5431] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5432] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5433] <... futex resumed>) = 0 [pid 5431] <... futex resumed>) = 1 [pid 5433] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5432] <... openat resumed>) = 5 [pid 5433] <... open resumed>) = 6 [pid 5431] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5432] ioctl(5, LOOP_SET_FD, 4 [pid 5433] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5431] <... futex resumed>) = 0 [pid 5433] <... futex resumed>) = 1 [ 62.626995][ T5432] syz-executor212[5432]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 62.630295][ T28] audit: type=1800 audit(1693866693.371:103): pid=5433 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [pid 5431] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5433] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5431] <... futex resumed>) = 0 [pid 5433] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5432] <... ioctl resumed>) = 0 [pid 5431] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5433] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5431] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5433] <... futex resumed>) = 0 [pid 5433] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5432] close(4) = 0 [pid 5432] mkdir("./file1", 0777) = 0 [ 62.675250][ T5432] loop0: detected capacity change from 0 to 512 [pid 5432] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5432] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 4 [pid 5432] chdir("./file1") = 0 [pid 5432] ioctl(5, LOOP_CLR_FD) = 0 [pid 5432] close(5) = 0 [pid 5432] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5431] exit_group(0) = ? [pid 5432] <... futex resumed>) = ? [pid 5433] <... futex resumed>) = ? [pid 5432] +++ exited with 0 +++ [pid 5433] +++ exited with 0 +++ [pid 5431] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5431, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./101", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./101", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./101/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./101/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./101/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./101/bus") = 0 umount2("./101/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./101/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./101/binderfs") = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./101/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./101/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./101/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./101/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./101") = 0 mkdir("./102", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [ 62.697764][ T5432] EXT4-fs (loop0): 1 orphan inode deleted [ 62.703537][ T5432] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/101/file1 supports timestamps until 2038-01-19 (0x7fffffff) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5436 ./strace-static-x86_64: Process 5436 attached [pid 5436] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5436] chdir("./102") = 0 [pid 5436] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5436] setpgid(0, 0) = 0 [pid 5436] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5436] write(3, "1000", 4) = 4 [pid 5436] close(3) = 0 [pid 5436] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5436] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5436] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5436] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5436] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5436] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5436] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5436] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5437 attached [pid 5437] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5436] <... clone3 resumed> => {parent_tid=[5437]}, 88) = 5437 [pid 5437] <... rseq resumed>) = 0 [pid 5436] rt_sigprocmask(SIG_SETMASK, [], [pid 5437] set_robust_list(0x7f81bb1be9a0, 24 [pid 5436] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5437] <... set_robust_list resumed>) = 0 [pid 5436] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5437] rt_sigprocmask(SIG_SETMASK, [], [pid 5436] <... futex resumed>) = 0 [pid 5437] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5436] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5437] memfd_create("syzkaller", 0 [pid 5436] <... futex resumed>) = 0 [pid 5436] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5436] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5436] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5436] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5438 attached [pid 5438] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5438] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5436] <... clone3 resumed> => {parent_tid=[5438]}, 88) = 5438 [pid 5438] rt_sigprocmask(SIG_SETMASK, [], [pid 5436] rt_sigprocmask(SIG_SETMASK, [], [pid 5438] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5436] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5438] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5437] <... memfd_create resumed>) = 3 [pid 5437] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f81b2d7d000 [pid 5436] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5438] <... futex resumed>) = 0 [pid 5436] <... futex resumed>) = 1 [pid 5438] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5436] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5438] <... open resumed>) = 4 [pid 5438] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5437] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5436] <... futex resumed>) = 0 [pid 5436] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5436] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5438] <... futex resumed>) = 1 [pid 5438] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5438] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5436] <... futex resumed>) = 0 [pid 5436] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5436] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5438] <... futex resumed>) = 1 [pid 5438] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5438] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5436] <... futex resumed>) = 0 [pid 5436] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5438] <... futex resumed>) = 1 [pid 5436] <... futex resumed>) = 0 [pid 5438] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5436] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5438] <... write resumed>) = -1 ENOSPC (No space left on device) [pid 5438] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5436] <... futex resumed>) = 0 [pid 5438] <... futex resumed>) = 1 [pid 5438] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5437] <... write resumed>) = 262144 [pid 5437] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5437] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5437] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5437] close(3) = 0 [pid 5437] mkdir("./file1", 0777) = 0 [ 62.771480][ T5437] syz-executor212[5437]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 62.783355][ T28] audit: type=1800 audit(1693866693.521:104): pid=5438 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [ 62.810313][ T5437] loop0: detected capacity change from 0 to 512 [pid 5437] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5437] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5437] chdir("./file1") = 0 [pid 5437] ioctl(6, LOOP_CLR_FD) = 0 [pid 5437] close(6) = 0 [pid 5437] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5437] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5436] exit_group(0 [pid 5438] <... futex resumed>) = ? [pid 5437] <... futex resumed>) = ? [pid 5436] <... exit_group resumed>) = ? [pid 5437] +++ exited with 0 +++ [pid 5438] +++ exited with 0 +++ [pid 5436] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5436, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./102", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./102", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./102/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./102/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./102/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./102/bus") = 0 umount2("./102/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./102/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./102/binderfs") = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./102/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./102/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./102/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./102/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./102") = 0 mkdir("./103", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5441 ./strace-static-x86_64: Process 5441 attached [pid 5441] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5441] chdir("./103") = 0 [pid 5441] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5441] setpgid(0, 0) = 0 [pid 5441] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5441] write(3, "1000", 4) = 4 [ 62.827797][ T5437] EXT4-fs (loop0): 1 orphan inode deleted [ 62.833755][ T5437] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/102/file1 supports timestamps until 2038-01-19 (0x7fffffff) [pid 5441] close(3) = 0 [pid 5441] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5441] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5441] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5441] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5441] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5441] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5441] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5441] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5442 attached => {parent_tid=[5442]}, 88) = 5442 [pid 5442] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5441] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5442] <... rseq resumed>) = 0 [pid 5442] set_robust_list(0x7f81bb1be9a0, 24 [pid 5441] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5442] <... set_robust_list resumed>) = 0 [pid 5441] <... futex resumed>) = 0 [pid 5441] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5442] rt_sigprocmask(SIG_SETMASK, [], [pid 5441] <... futex resumed>) = 0 [pid 5442] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5441] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5442] memfd_create("syzkaller", 0 [pid 5441] <... mmap resumed>) = 0x7f81bb17d000 [pid 5442] <... memfd_create resumed>) = 3 [pid 5441] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5442] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5441] <... mprotect resumed>) = 0 [pid 5442] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5441] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5441] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5442] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5441] <... clone3 resumed> => {parent_tid=[5443]}, 88) = 5443 [pid 5441] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5441] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5441] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5443 attached [pid 5443] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5443] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5442] <... write resumed>) = 262144 [pid 5443] rt_sigprocmask(SIG_SETMASK, [], [pid 5442] munmap(0x7f81b2d7d000, 262144 [pid 5443] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5442] <... munmap resumed>) = 0 [pid 5443] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5442] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5443] <... open resumed>) = 5 [pid 5442] ioctl(4, LOOP_SET_FD, 3 [pid 5443] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5443] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5441] <... futex resumed>) = 0 [pid 5441] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5443] <... futex resumed>) = 0 [pid 5441] <... futex resumed>) = 1 [pid 5443] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5441] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5443] <... mount resumed>) = 0 [pid 5443] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5441] <... futex resumed>) = 0 [ 62.897256][ T5442] syz-executor212[5442]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 62.923162][ T28] audit: type=1800 audit(1693866693.661:105): pid=5443 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor212" name="bus" dev="sda1" ino=1930 res=0 errno=0 [pid 5443] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5441] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5443] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5441] <... futex resumed>) = 0 [pid 5443] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5441] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5443] <... open resumed>) = 6 [pid 5443] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5442] <... ioctl resumed>) = 0 [pid 5443] <... futex resumed>) = 1 [pid 5441] <... futex resumed>) = 0 [pid 5443] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5442] close(3 [pid 5441] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5443] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5442] <... close resumed>) = 0 [pid 5441] <... futex resumed>) = 0 [pid 5443] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5442] mkdir("./file1", 0777 [pid 5441] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5443] <... write resumed>) = 262144 [pid 5443] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5441] <... futex resumed>) = 0 [pid 5442] <... mkdir resumed>) = 0 [pid 5443] <... futex resumed>) = 1 [pid 5442] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5443] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5442] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5442] ioctl(4, LOOP_CLR_FD) = 0 [pid 5442] close(4) = 0 [pid 5442] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5442] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5441] exit_group(0 [pid 5443] <... futex resumed>) = ? [pid 5442] <... futex resumed>) = ? [pid 5441] <... exit_group resumed>) = ? [pid 5443] +++ exited with 0 +++ [pid 5442] +++ exited with 0 +++ [pid 5441] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5441, si_uid=0, si_status=0, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./103", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./103", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./103/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./103/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./103/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./103/bus") = 0 umount2("./103/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./103/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./103/binderfs") = 0 umount2("./103/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./103/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./103/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./103/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./103/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./103") = 0 mkdir("./104", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5444 attached , child_tidptr=0x555556eda690) = 5444 [pid 5444] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5444] chdir("./104") = 0 [pid 5444] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5444] setpgid(0, 0) = 0 [pid 5444] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5444] write(3, "1000", 4) = 4 [pid 5444] close(3) = 0 [pid 5444] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5444] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5444] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5444] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5444] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5444] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5444] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5444] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5445]}, 88) = 5445 [pid 5444] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5444] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5444] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5444] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 ./strace-static-x86_64: Process 5445 attached [pid 5444] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5445] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5444] <... mprotect resumed>) = 0 [pid 5445] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5445] rt_sigprocmask(SIG_SETMASK, [], [pid 5444] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5445] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5444] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5444] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5445] memfd_create("syzkaller", 0) = 3 ./strace-static-x86_64: Process 5446 attached [pid 5445] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5446] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5444] <... clone3 resumed> => {parent_tid=[5446]}, 88) = 5446 [pid 5446] <... rseq resumed>) = 0 [pid 5445] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5446] set_robust_list(0x7f81bb19d9a0, 24 [pid 5444] rt_sigprocmask(SIG_SETMASK, [], [pid 5446] <... set_robust_list resumed>) = 0 [ 62.923368][ T5442] loop0: detected capacity change from 0 to 512 [ 62.958764][ T5442] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 5446] rt_sigprocmask(SIG_SETMASK, [], [pid 5444] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5446] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5444] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5446] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5444] <... futex resumed>) = 0 [pid 5446] <... open resumed>) = 4 [pid 5445] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5444] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5446] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5444] <... futex resumed>) = 0 [pid 5444] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5444] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5446] <... futex resumed>) = 1 [pid 5446] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5446] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5444] <... futex resumed>) = 0 [pid 5444] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5444] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5446] <... futex resumed>) = 1 [pid 5446] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5446] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5444] <... futex resumed>) = 0 [pid 5444] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5446] <... futex resumed>) = 1 [pid 5444] <... futex resumed>) = 0 [pid 5446] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5444] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5446] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5446] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5444] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5445] <... write resumed>) = 262144 [pid 5445] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5445] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5445] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5445] close(3) = 0 [pid 5445] mkdir("./file1", 0777) = 0 [pid 5445] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5445] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5445] chdir("./file1") = 0 [pid 5445] ioctl(6, LOOP_CLR_FD) = 0 [pid 5445] close(6) = 0 [pid 5445] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5444] exit_group(0 [pid 5446] <... futex resumed>) = ? [pid 5444] <... exit_group resumed>) = ? [pid 5446] +++ exited with 0 +++ [pid 5445] +++ exited with 0 +++ [pid 5444] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5444, si_uid=0, si_status=0, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./104", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./104", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./104/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./104/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./104/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./104/bus") = 0 umount2("./104/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./104/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./104/binderfs") = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./104/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./104/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./104/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./104/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./104") = 0 mkdir("./105", 0777) = 0 [ 63.023792][ T5445] loop0: detected capacity change from 0 to 512 [ 63.051406][ T5445] EXT4-fs (loop0): 1 orphan inode deleted [ 63.057678][ T5445] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/104/file1 supports timestamps until 2038-01-19 (0x7fffffff) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556eda690) = 5449 ./strace-static-x86_64: Process 5449 attached [pid 5449] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5449] chdir("./105") = 0 [pid 5449] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5449] setpgid(0, 0) = 0 [pid 5449] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5449] write(3, "1000", 4) = 4 [pid 5449] close(3) = 0 [pid 5449] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5449] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5449] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5449] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5449] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5449] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5449] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5449] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5450 attached => {parent_tid=[5450]}, 88) = 5450 [pid 5449] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5449] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5449] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5449] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5450] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5449] <... mmap resumed>) = 0x7f81bb17d000 [pid 5449] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5450] set_robust_list(0x7f81bb1be9a0, 24) = 0 [pid 5449] <... mprotect resumed>) = 0 [pid 5450] rt_sigprocmask(SIG_SETMASK, [], [pid 5449] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5450] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5449] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0} [pid 5450] memfd_create("syzkaller", 0./strace-static-x86_64: Process 5451 attached [pid 5449] <... clone3 resumed> => {parent_tid=[5451]}, 88) = 5451 [pid 5451] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053) = 0 [pid 5449] rt_sigprocmask(SIG_SETMASK, [], [pid 5451] set_robust_list(0x7f81bb19d9a0, 24 [pid 5449] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5451] <... set_robust_list resumed>) = 0 [pid 5450] <... memfd_create resumed>) = 3 [pid 5451] rt_sigprocmask(SIG_SETMASK, [], [pid 5449] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5451] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5449] <... futex resumed>) = 0 [pid 5451] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000 [pid 5450] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5449] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5451] <... open resumed>) = 4 [pid 5450] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5451] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5449] <... futex resumed>) = 0 [pid 5449] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5449] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5451] <... futex resumed>) = 1 [pid 5451] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 5451] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5449] <... futex resumed>) = 0 [pid 5449] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5450] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 5449] <... futex resumed>) = 0 [pid 5449] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5451] <... futex resumed>) = 1 [pid 5451] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 [pid 5451] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5449] <... futex resumed>) = 0 [pid 5449] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5449] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5451] <... futex resumed>) = 1 [pid 5451] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = -1 ENOSPC (No space left on device) [pid 5451] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5449] <... futex resumed>) = 0 [pid 5451] <... futex resumed>) = 1 [pid 5451] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5450] <... write resumed>) = 262144 [pid 5450] munmap(0x7f81b2d7d000, 262144) = 0 [pid 5450] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 [pid 5450] ioctl(6, LOOP_SET_FD, 3) = 0 [pid 5450] close(3) = 0 [pid 5450] mkdir("./file1", 0777) = 0 [pid 5450] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"...) = 0 [pid 5450] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5450] chdir("./file1") = 0 [pid 5450] ioctl(6, LOOP_CLR_FD) = 0 [pid 5450] close(6) = 0 [pid 5450] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5450] futex(0x7f81bb2896c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5449] exit_group(0) = ? [pid 5451] <... futex resumed>) = ? [pid 5450] <... futex resumed>) = ? [pid 5451] +++ exited with 0 +++ [pid 5450] +++ exited with 0 +++ [pid 5449] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5449, si_uid=0, si_status=0, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./105", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./105", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./105/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./105/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./105/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./105/bus") = 0 umount2("./105/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./105/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./105/binderfs") = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./105/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./105/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./105/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./105/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./105") = 0 [ 63.140867][ T5450] loop0: detected capacity change from 0 to 512 [ 63.157714][ T5450] EXT4-fs (loop0): 1 orphan inode deleted [ 63.163672][ T5450] ext4 filesystem being mounted at /root/syzkaller.p0uXmg/105/file1 supports timestamps until 2038-01-19 (0x7fffffff) mkdir("./106", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5454 attached , child_tidptr=0x555556eda690) = 5454 [pid 5454] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5454] chdir("./106") = 0 [pid 5454] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5454] setpgid(0, 0) = 0 [pid 5454] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5454] write(3, "1000", 4) = 4 [pid 5454] close(3) = 0 [pid 5454] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5454] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5454] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5454] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5454] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5454] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5454] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5454] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0} => {parent_tid=[5455]}, 88) = 5455 ./strace-static-x86_64: Process 5455 attached [pid 5455] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053 [pid 5454] rt_sigprocmask(SIG_SETMASK, [], [pid 5455] <... rseq resumed>) = 0 [pid 5455] set_robust_list(0x7f81bb1be9a0, 24 [pid 5454] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5455] <... set_robust_list resumed>) = 0 [pid 5454] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5454] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5454] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5454] mprotect(0x7f81bb17e000, 131072, PROT_READ|PROT_WRITE [pid 5455] rt_sigprocmask(SIG_SETMASK, [], [pid 5454] <... mprotect resumed>) = 0 [pid 5455] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5455] memfd_create("syzkaller", 0) = 3 [pid 5455] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5454] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5455] <... mmap resumed>) = 0x7f81b2d7d000 [pid 5454] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb19d990, parent_tid=0x7f81bb19d990, exit_signal=0, stack=0x7f81bb17d000, stack_size=0x20300, tls=0x7f81bb19d6c0}./strace-static-x86_64: Process 5456 attached => {parent_tid=[5456]}, 88) = 5456 [pid 5454] rt_sigprocmask(SIG_SETMASK, [], [pid 5456] rseq(0x7f81bb19dfe0, 0x20, 0, 0x53053053 [pid 5454] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5454] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5456] <... rseq resumed>) = 0 [pid 5454] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5456] set_robust_list(0x7f81bb19d9a0, 24) = 0 [pid 5456] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5456] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [pid 5456] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5455] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 5454] <... futex resumed>) = 0 [pid 5456] <... futex resumed>) = 1 [pid 5456] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 5454] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5455] munmap(0x7f81b2d7d000, 262144 [pid 5456] <... mount resumed>) = 0 [pid 5454] <... futex resumed>) = 0 [pid 5455] <... munmap resumed>) = 0 [pid 5454] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5456] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5455] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5456] <... futex resumed>) = 1 [pid 5454] <... futex resumed>) = 0 [pid 5456] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5454] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5456] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5454] <... futex resumed>) = 0 [pid 5456] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c [pid 5454] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5455] <... openat resumed>) = 5 [pid 5456] <... open resumed>) = 6 [pid 5455] ioctl(5, LOOP_SET_FD, 3 [pid 5456] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5454] <... futex resumed>) = 0 [pid 5455] <... ioctl resumed>) = 0 [pid 5456] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5455] close(3 [pid 5454] futex(0x7f81bb2896d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5455] <... close resumed>) = 0 [pid 5454] <... futex resumed>) = 0 [pid 5455] mkdir("./file1", 0777 [pid 5454] futex(0x7f81bb2896dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5455] <... mkdir resumed>) = 0 [pid 5455] mount("/dev/loop0", "./file1", "ext4", MS_NOSYMFOLLOW|MS_NOATIME|MS_REC, "bsddf,sysvgroups,dioread_lock,grpquota,noauto_da_alloc,resgid=0x0000000000000000,barrier,auto_da_all"... [pid 5456] <... write resumed>) = 262144 [pid 5456] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5454] <... futex resumed>) = 0 [pid 5456] futex(0x7f81bb2896d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5455] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 5455] ioctl(5, LOOP_CLR_FD) = 0 [pid 5455] close(5) = 0 [pid 5455] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5454] exit_group(0 [pid 5456] <... futex resumed>) = ? [pid 5454] <... exit_group resumed>) = ? [pid 5456] +++ exited with 0 +++ [pid 5455] +++ exited with 0 +++ [pid 5454] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5454, si_uid=0, si_status=0, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./106", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./106", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556edb730 /* 5 entries */, 32768) = 136 umount2("./106/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./106/bus", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./106/bus", {st_mode=S_IFREG|000, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./106/bus") = 0 umount2("./106/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./106/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./106/binderfs") = 0 umount2("./106/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./106/file1", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./106/file1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./106/file1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556ee3770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556ee3770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./106/file1") = 0 getdents64(3, 0x555556edb730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./106") = 0 mkdir("./107", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5457 attached [pid 5457] set_robust_list(0x555556eda6a0, 24) = 0 [pid 5457] chdir("./107") = 0 [pid 5457] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5024] <... clone resumed>, child_tidptr=0x555556eda690) = 5457 [pid 5457] <... prctl resumed>) = 0 [pid 5457] setpgid(0, 0) = 0 [pid 5457] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5457] write(3, "1000", 4) = 4 [pid 5457] close(3) = 0 [pid 5457] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5457] futex(0x7f81bb2896cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5457] rt_sigaction(SIGRT_1, {sa_handler=0x7f81bb228030, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f81bb2191e0}, NULL, 8) = 0 [pid 5457] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5457] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb19e000 [pid 5457] mprotect(0x7f81bb19f000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5457] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5457] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f81bb1be990, parent_tid=0x7f81bb1be990, exit_signal=0, stack=0x7f81bb19e000, stack_size=0x20300, tls=0x7f81bb1be6c0}./strace-static-x86_64: Process 5458 attached [pid 5458] rseq(0x7f81bb1befe0, 0x20, 0, 0x53053053) = 0 [pid 5457] <... clone3 resumed> => {parent_tid=[5458]}, 88) = 5458 [pid 5458] set_robust_list(0x7f81bb1be9a0, 24 [pid 5457] rt_sigprocmask(SIG_SETMASK, [], [pid 5458] <... set_robust_list resumed>) = 0 [pid 5457] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5458] rt_sigprocmask(SIG_SETMASK, [], [pid 5457] futex(0x7f81bb2896c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5458] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5457] <... futex resumed>) = 0 [pid 5458] memfd_create("syzkaller", 0 [pid 5457] futex(0x7f81bb2896dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5457] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f81bb17d000 [pid 5458] <... memfd_create resumed>) = 3 [pid 5458] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, M